How often is this glossary updated?

We review every entry at least once per quarter and add new terms whenever the industry adopts them. Each definition shows its last-updated date on its detail page, so you can always tell how fresh the information is.

Who writes the definitions?

Definitions are drafted in-house by the itokenly editorial team and verified by Marcus Reynolds, our senior crypto editor. We cross-check every entry against primary sources (whitepapers, protocol docs, and academic papers) before publishing.

What's the difference between a glossary entry and a full guide?

Glossary entries are short reference definitions (1-2 paragraphs) optimized for quickly answering "what does X mean?". Full guides go deeper — explaining how something works, when to use it, and what to watch out for. We link from glossary entries to relevant in-depth guides.

Do you cover NFT, DeFi, and Layer 2 terms?

Yes. The glossary spans 29 categories including Bitcoin, Ethereum, DeFi, NFTs and gaming, wallets and security, layer 2 and scaling, mining, regulation, privacy and cryptography, stablecoins, prediction markets, RWAs, AI x crypto, DePIN, CBDCs, and more. Use the category filter or alphabet navigation to find what you need.

Is the glossary free to use?

Yes — the entire glossary is free, has no paywalls, and never asks for an email. We do not run ads on glossary pages. Our goal is to be the fastest, clearest reference for crypto terminology on the web.

I noticed a missing or inaccurate term. Can I report it?

Absolutely — corrections from readers are how we keep the glossary sharp. Email the editorial team and we'll respond within a few business days. We credit contributors who supply factual corrections that lead to a published edit.

How is each definition verified?

Every entry passes through a two-step check: an editor cross-references the term against at least one primary source (protocol docs, whitepaper, or peer-reviewed paper) and one independent secondary source (technical blog, academic site, or industry publication). Disputed or evolving terminology is flagged.

Crypto Glossary 2026: Blockchain & Cryptocurrency Terms Explained

A comprehensive crypto glossary covering Bitcoin, Ethereum, DeFi, NFTs, wallets, mining, regulation, and more. Each term explained in plain English in 1-2 paragraphs.

272 termsUpdated June 7, 2026Reviewed by Marcus Reynolds

Crypto moves fast, and so does its language. New protocols, scaling techniques, financial primitives, and security threats appear every month, and each one arrives with its own shorthand. This glossary exists because there is no shortcut to making informed decisions without the vocabulary. Whether you're trying to follow a Twitter thread, audit a smart contract, evaluate a DeFi yield, or simply understand what your wallet is asking you to sign — terminology is the gate.

We built this reference to be the fastest, clearest answer to “what does this mean?” Every entry is between one and two paragraphs: long enough to actually explain the concept, short enough to read in under a minute. We deliberately avoid hype, marketing language, and the kind of circular definition that pretends to explain ethereum by referencing “the EVM” three words in. Where a term has multiple meanings in different contexts, we pick the one most relevant to crypto and call out the others.

The glossary spans 29 categories — from Bitcoin and Ethereum fundamentals through DeFi, rollups, mining, NFTs and gaming, wallets and security, regulation, privacy cryptography, and emerging areas like AI×crypto, DePIN, prediction markets, and tokenized real-world assets. Use the category filters below to drill into a specific area, the alphabet navigation to jump by letter, or the search box to find a specific term in milliseconds.

Definitions are drafted by the itokenly editorial team and reviewed by Marcus Reynolds, our senior crypto editor, before publication. Every entry is verified against at least one primary source (whitepaper or protocol docs) and one independent secondary source. We re-audit every term at least quarterly. If you spot something inaccurate or missing, the FAQ at the bottom of this page explains how to flag it — corrections are how we keep this reference sharp.

Most-searched terms

Start here if you're new

A

AI Agent (Crypto)AI & Crypto: An AI agent in crypto is software that uses AI to make decisions and take blockchain actions, such as trading, monitoring wallets, or executing transactions.
AMLRegulation & Tax: Anti-money laundering rules and processes aim to stop criminals from using financial systems, including crypto platforms, to hide or move illicit funds.
AMMDeFi: An automated market maker is a DeFi protocol that uses liquidity pools and algorithms to price and swap crypto assets without a traditional order book.
APRStaking & Yield: APR is the simple annual rate of return or cost, shown before compounding, often used to compare staking, lending, and borrowing yields.
APYStaking & Yield: APY is the annualized percentage rate showing how much a crypto yield position could earn in one year, including compounding.
ASICBitcoin: A specialized computer chip built to do one task very efficiently, commonly used in Bitcoin mining to perform hashing calculations.
Account Abstraction (ERC-4337)Ethereum: A way for Ethereum wallets to act like smart contracts, enabling features such as gas sponsorship, account recovery, and custom transaction rules.
Address PoisoningWallets & Security: A wallet scam where attackers plant lookalike addresses in your transaction history so you might copy the wrong recipient later.
Agentic AIAI & Crypto: AI systems that can plan, make decisions, and take actions toward a goal with limited human step-by-step direction.
AggregatorDeFi: A DeFi service that searches multiple protocols to find better prices, routes, or yields for a user’s transaction.
AirdropTokenomics & Launches: A token distribution method where a project sends free tokens to users, often to reward early activity or broaden ownership.
Algorithmic StablecoinStablecoins: A stablecoin that uses software rules and market incentives to try to keep its price near a target, usually without full collateral backing.
AltcoinAltcoins: Any cryptocurrency other than Bitcoin, often designed with different features, trade-offs, or use cases.
Approval PhishingWallets & Security: A scam that tricks users into granting a malicious wallet or smart contract permission to spend tokens from their wallet.
Asset-Backed TokenReal World Assets (RWA): A digital token whose value is linked to an underlying asset, such as cash, gold, real estate, or other real-world collateral.
Atomic SwapBlockchain Fundamentals: A peer-to-peer crypto trade that lets two parties exchange different coins directly without relying on a centralized exchange or custodian.
Autonomous AgentAI & Crypto: Software that can make decisions and take actions toward a goal with limited human input, often using AI and blockchain tools.

B

BIP-39Wallets & Security: A standard for turning wallet backup data into a human-readable seed phrase, usually 12 or 24 words.
BTCBitcoin: The ticker symbol for bitcoin, the native currency of the Bitcoin network.
Bag (Crypto Slang)Crypto Investing: A bag is the amount of a particular cryptocurrency someone holds, often implying a sizable position or one they are stuck holding.
Bandwidth TokenDePIN: A crypto token used to pay for, meter, or reward data-transfer capacity in a decentralized network.
Basis TradeCrypto Trading: A trading strategy that seeks to profit from the price gap between a crypto asset’s spot price and its futures or perpetual contract price.
Beacon ChainEthereum: Ethereum’s proof-of-stake coordination layer that organizes validators and finalizes blocks for the network.
BitLicenseRegulation & Tax: A state license required for many virtual currency businesses that serve customers in New York.
BitcoinBitcoin: A decentralized digital currency and payment network that lets people send value without relying on a bank or central authority.
Block (Blockchain)Blockchain Fundamentals: A block is a bundled set of blockchain transactions and metadata that is added to the chain after the network accepts it as valid.
Block HeightBitcoin: A block height is the number that shows a block’s position in a blockchain, counted from the first block.
Block RewardBitcoin: New cryptocurrency paid to a miner or validator for successfully adding a block to a blockchain.
BlockchainBlockchain Fundamentals: A blockchain is a shared digital ledger that records transactions in linked batches and is maintained by a network of computers.
Blockchain ForkBlockchain Fundamentals: A blockchain fork is a split or change in a blockchain’s rules that can create two different versions of the network’s transaction history.
Bollinger BandsTechnical Analysis: A volatility indicator that plots bands around a moving average to show when a crypto asset may be unusually high, low, or entering a volatile period.
Bonding CurveMemecoins: A pricing formula that automatically changes a token’s price based on how many tokens have been bought or sold.
Bullish DivergenceTechnical Analysis: A bullish divergence is a chart signal where price makes lower lows while an indicator makes higher lows, hinting that selling pressure may be weakening.

C

CARFRegulation & Tax: CARF is an OECD framework for tax reporting and automatic exchange of information about crypto-asset transactions.
CBDCCBDCs: A central bank digital currency is digital money issued by a country’s central bank and designed to function as official legal tender.
Candlestick ChartTechnical Analysis: A price chart that shows an asset’s open, high, low, and close over repeated time periods.
CeFiCeFi: Centralized finance is crypto services run by companies that custody assets, manage accounts, and provide trading, lending, or yield products.
Centralized ExchangeCeFi: A platform run by a company that lets users buy, sell, and trade cryptocurrencies through managed accounts and order books.
Cliff (Vesting)Tokenomics & Launches: A cliff is the initial waiting period in a vesting schedule before any allocated tokens can be unlocked or claimed.
Cloud MiningMining: Renting remote cryptocurrency mining hardware or hash power from a provider instead of running miners yourself.
CoinJoinCryptography & Privacy: A privacy technique that combines multiple users’ cryptocurrency payments into one transaction to make input-output links harder to trace.
Coinbase TransactionBitcoin: A special Bitcoin transaction that creates the block reward and pays it, along with transaction fees, to the miner of a new block.
Collateralized StablecoinStablecoins: A stablecoin backed by assets held as collateral to help keep its price close to a target value, usually a fiat currency like the US dollar.
Compute NetworkDePIN: A decentralized marketplace that connects people who need computing power with providers who supply spare hardware resources.
Compute TokenAI & Crypto: A crypto asset used to pay for, meter, or coordinate access to computing power, often in decentralized AI or cloud networks.
Conditional TokenPrediction Markets: A digital token whose value or payout depends on the outcome of a specific future event or condition.
Consensus MechanismBlockchain Fundamentals: A method a blockchain network uses to agree on valid transactions and the current state of the ledger without a central authority.
Cross-Chain BridgeBlockchain Fundamentals: A cross-chain bridge is a tool that lets users move tokens or data between separate blockchain networks.
Crypto AddressBlockchain Fundamentals: A unique string of characters used to receive cryptocurrency or interact with a blockchain account.
Crypto AvatarMetaverse: A blockchain-linked digital identity or character used to represent a person in games, metaverse spaces, and online communities.
Crypto LoanCeFi: A loan that uses cryptocurrency as collateral or provides borrowed crypto or cash through a crypto lending platform.
Crypto MixerCryptography & Privacy: A service or protocol that blends cryptocurrency from many users to make transaction trails harder to trace on a public blockchain.
Crypto Tax Loss HarvestingRegulation & Tax: A tax strategy where investors sell crypto at a loss to realize a capital loss that may offset taxable gains, subject to local rules.
Crypto TransactionBlockchain Fundamentals: A crypto transaction is a signed message that moves cryptocurrency or data between addresses on a blockchain.
Crypto WalletWallets & Security: A tool that stores and manages the private keys needed to access and use cryptocurrency on a blockchain.
Custodial WalletWallets & Security: A wallet where a third party, such as an exchange, holds the private keys and controls access to the crypto on your behalf.
Custodian (Crypto)CeFi: A crypto custodian is a service that holds and safeguards digital assets or private keys on behalf of users or institutions.

D

DAIStablecoins: A crypto-backed stablecoin designed to track the value of the U.S. dollar without relying solely on bank deposits.
DAODAOs & Governance: A DAO is an online organization run by shared rules and member voting, often using blockchain-based tokens and smart contracts.
DAO ProposalDAOs & Governance: A formal request submitted to a DAO for members to review, discuss, and vote on before the organization takes action.
DEXDeFi: A decentralized exchange is a crypto marketplace where users trade directly from their wallets using smart contracts instead of a central intermediary.
Data AvailabilityLayer 2 & Scaling: The assurance that the transaction data needed to verify a blockchain or layer 2 network can be accessed by anyone who needs it.
DeFiDeFi: A blockchain-based financial ecosystem that lets people lend, borrow, trade, and earn yield without traditional banks or brokers.
DePINDePIN: Decentralized physical infrastructure networks use blockchains and tokens to coordinate real-world services such as wireless coverage, storage, sensors, or energy.
DecentralizationBlockchain Fundamentals: Decentralization is the distribution of control, decision-making, and record-keeping across many participants instead of a single central authority.
Decentralized AIAI & Crypto: AI systems that use blockchain, peer-to-peer networks, or token incentives to distribute data, computing, model ownership, or decision-making.
Delegation (Staking)Staking & Yield: Delegation is assigning your tokens’ staking power to a validator so they can help secure a proof-of-stake network and share rewards with you.
DepegStablecoins: A depeg happens when a stablecoin or pegged crypto asset trades noticeably away from the value it is meant to track.
Dev WalletMemecoins: A wallet controlled by a token’s creator or team, often used to hold supply, fund development, add liquidity, or manage launches.
Difficulty AdjustmentBitcoin: A network rule that regularly changes how hard miners must work to add blocks so Bitcoin keeps producing blocks at a steady pace.
Digital EuroCBDCs: A digital euro is a proposed central bank digital currency that would let people and businesses use euro-area central bank money electronically.
Digital SignatureCryptography & Privacy: A digital signature is cryptographic proof that a message or transaction was approved by the holder of a specific private key.
Digital YuanCBDCs: China’s central bank digital currency, a digital form of the yuan issued by the People’s Bank of China for everyday payments.
Diversification (Crypto)Crypto Investing: Spreading crypto exposure across different assets, sectors, or strategies to reduce dependence on any single coin or outcome.
Dollar-Cost AveragingCrypto Investing: A strategy of investing a fixed amount at regular intervals to reduce the impact of short-term price swings.
Dust AttackWallets & Security: A privacy attack where tiny amounts of crypto are sent to wallets so the attacker can track when they are later spent.

E

EIPEthereum: An Ethereum Improvement Proposal is a formal document used to suggest, discuss, and standardize changes to the Ethereum network or ecosystem.
ERC-1155Ethereum: An Ethereum token standard that lets one smart contract create and manage multiple token types, including fungible tokens, NFTs, and semi-fungible items.
ERC-20Ethereum: A widely used Ethereum token standard that defines common rules for creating and interacting with fungible tokens.
ERC-721Ethereum: A token standard on Ethereum for creating non-fungible tokens, where each token is unique and can represent a distinct digital or real-world item.
EigenLayerEthereum: A protocol on Ethereum that lets stakers reuse their ETH or liquid staking tokens to help secure additional networks and services.
Emission ScheduleTokenomics & Launches: A plan that defines how and when new tokens are created, released, or unlocked into circulation.
Ether (ETH)Ethereum: The native cryptocurrency of Ethereum, used to pay transaction fees, secure the network, and interact with apps and smart contracts.
EthereumEthereum: A decentralized blockchain platform that runs smart contracts and applications, using ether (ETH) to pay for network activity.
Ethereum Virtual MachineEthereum: The runtime environment that executes smart contracts and updates Ethereum’s shared state across all participating nodes.
Ethers.jsWeb3 & Development: A JavaScript library that helps developers build apps that interact with Ethereum and other EVM-compatible blockchains.

F

FATFRegulation & Tax: The Financial Action Task Force is a global standard-setter for anti-money-laundering and counter-terrorist-financing rules.
FIT21Regulation & Tax: A U.S. crypto market-structure bill that aims to clarify which digital assets are regulated by the SEC or CFTC and how crypto firms must comply.
Fair LaunchTokenomics & Launches: A token launch model that aims to give the public equal initial access, with no special early allocations for insiders or private investors.
Fiat Off-RampExchanges & Platforms: A fiat off-ramp is a service that lets users convert cryptocurrency into government-issued money and withdraw it to a bank, card, or payment account.
Fiat On-RampExchanges & Platforms: A fiat on-ramp is a service that lets users buy cryptocurrency with traditional money such as dollars, euros, or pounds.
Fibonacci RetracementTechnical Analysis: A charting tool that marks possible support and resistance levels based on Fibonacci ratios after a price move.
FinalityBlockchain Fundamentals: The point at which a blockchain transaction or block is considered irreversible and cannot be practically changed or removed.
Flash LoanDeFi: A flash loan is an uncollateralized DeFi loan that must be borrowed and repaid within the same blockchain transaction.
Floor PriceNFTs & Gaming: The lowest listed sale price for an NFT in a specific collection on a marketplace.
FoundryWeb3 & Development: A fast Ethereum smart contract development toolkit used to build, test, debug, and deploy Solidity projects.
Fraud ProofLayer 2 & Scaling: A fraud proof is evidence submitted to a blockchain to show that a proposed transaction result or rollup state is invalid.
Full NodeWeb3 & Development: A full node is software that stores and verifies a blockchain’s history and rules without relying on a third party.
Fully Homomorphic EncryptionCryptography & Privacy: A cryptographic method that lets data be processed while still encrypted, so only the key holder can reveal the final result.
Funding RateCrypto Trading: A periodic payment between perpetual futures traders that helps keep the contract price close to the spot market price.

G

GPU MiningMining: Using graphics cards to perform the calculations needed to secure certain proof-of-work blockchains and earn newly issued coins or fees.
GameFiNFTs & Gaming: GameFi combines video games with blockchain-based assets and incentives, such as tokens, NFTs, and player-owned in-game items.
Gas FeeEthereum: A gas fee is the transaction cost paid to use a blockchain network, especially Ethereum, for actions like sending tokens or using smart contracts.
Generative ArtNFTs & Gaming: Art created through rules, code, or algorithms, often used in NFTs to produce unique digital works from the same creative system.
Genesis BlockAltcoins: The first block in a blockchain, used to start the network’s ledger and establish its initial rules or coin distribution.
Governance TokenDAOs & Governance: A governance token is a crypto asset that gives holders voting power over decisions in a blockchain protocol, DAO, or decentralized app.
GweiEthereum: Gwei is a small denomination of ether used to price gas fees on the Ethereum network.

H

HD WalletWallets & Security: A crypto wallet that uses one seed phrase to generate and recover many related private keys and addresses.
HODLCrypto Investing: A long-term crypto holding strategy where an investor keeps assets despite price volatility instead of selling during market swings.
HalvingBitcoin: A scheduled event that cuts the reward miners receive for adding new Bitcoin blocks in half.
Hard ForkBlockchain Fundamentals: A hard fork is a blockchain rule change that is not backward-compatible, creating a split unless all network participants upgrade.
HardhatWeb3 & Development: A development framework for building, testing, debugging, and deploying Ethereum smart contracts and decentralized applications.
Hardware WalletWallets & Security: A physical device that stores cryptocurrency private keys offline to help protect them from online attacks.
Hash FunctionCryptography & Privacy: A hash function turns any input into a fixed-length string of data that is easy to verify but extremely hard to reverse or predict.
HashrateBitcoin: Hashrate is the total computing power being used to perform hashing, most often to mine and secure proof-of-work blockchains like Bitcoin.

I

ICOTokenomics & Launches: An ICO is a token sale where a crypto project raises funds by selling newly created tokens to early supporters.
IDOTokenomics & Launches: An IDO is a token sale where a crypto project launches and sells its token through a decentralized exchange or launchpad.
IEOTokenomics & Launches: An IEO is a token sale run through a cryptocurrency exchange, where the exchange hosts the sale and lists or distributes the token to participants.
Impermanent LossDeFi: A temporary loss in value that liquidity providers can face when pooled token prices move compared with simply holding the tokens.
Indexer (Crypto)Web3 & Development: An indexer is a service that organizes raw blockchain data into searchable, app-friendly formats for wallets, dapps, analytics tools, and APIs.
Inference NetworkAI & Crypto: A decentralized system that runs AI models to produce outputs, often coordinating compute providers and payments through crypto networks.
Inflation HedgeMacroeconomics & Crypto: An asset or strategy used to help preserve purchasing power when prices rise and a currency loses value.
InscriptionsBitcoin: Data written directly into a blockchain transaction, most commonly on Bitcoin, to create or reference digital items such as images, text, or tokens.

K

KYCRegulation & Tax: A compliance process where a crypto service verifies a customer’s identity before allowing certain account features or transactions.

L

LP TokenDeFi: A token that represents your share of assets deposited into a decentralized exchange liquidity pool.
LRTDeFi: A Liquid Restaking Token represents a restaked asset while keeping it transferable and usable across DeFi.
LSTDeFi: A liquid staking token is a token that represents staked crypto and can be used in DeFi while the original asset remains locked in staking.
Layer 1 BlockchainAltcoins: A base blockchain network that runs its own consensus, validates transactions, and provides the foundation for tokens, apps, and higher-layer systems.
Layer 2Layer 2 & Scaling: A Layer 2 is a secondary network or protocol built on top of a blockchain to process transactions faster and cheaper while relying on the main chain for security.
Layer 3Layer 2 & Scaling: A Layer 3 is an application-specific blockchain layer built on top of a Layer 2 to add customization, scalability, or specialized features.
Lending ProtocolDeFi: A decentralized finance system that lets users lend or borrow crypto through smart contracts, usually using collateral and algorithmic interest rates.
Leverage TradingCrypto Trading: Leverage trading is using borrowed funds to open a larger crypto position than your own capital would normally allow.
Light ClientWeb3 & Development: A blockchain node or wallet that verifies network data using compact proofs instead of downloading and storing the full blockchain.
Lightning NetworkBitcoin: A second-layer payment network built on Bitcoin that enables faster, lower-cost transactions by settling most activity off-chain.
Limit OrderCrypto Trading: An order to buy or sell a cryptocurrency only at a specified price or better.
Liquid StakingDeFi: Liquid staking lets users stake crypto while receiving a token that represents their staked assets and can be used elsewhere in DeFi.
LiquidationDeFi: The forced closing of a leveraged trade or collateralized loan when its value falls below the required safety threshold.
Liquidity CycleMacroeconomics & Crypto: A liquidity cycle is the recurring expansion and contraction of available money and credit that influences risk assets, including crypto.
Liquidity PoolDeFi: A liquidity pool is a smart-contract-held reserve of crypto assets that lets users trade, lend, or borrow without relying on a traditional order book.
Lockup APRStaking & Yield: The annualized reward rate offered for staking, lending, or depositing crypto when funds must stay locked for a set period.
Lockup PeriodTokenomics & Launches: A lockup period is a set time when certain tokens cannot be sold, transferred, or claimed after a launch, investment, or allocation.
Long PositionCrypto Trading: A trade that aims to profit when a crypto asset’s price rises.

M

MACDTechnical Analysis: A momentum indicator that compares moving averages to help traders spot possible trend changes in a crypto asset’s price.
MEVDeFi: MEV is extra profit block producers or bots can capture by choosing, reordering, inserting, or excluding transactions in a blockchain block.
Macro CycleMacroeconomics & Crypto: A macro cycle is a broad phase of economic conditions, such as expansion or recession, that can influence crypto prices and investor behavior.
Maker / Taker FeeExchanges & Platforms: A maker/taker fee is an exchange trading fee model that charges different rates depending on whether an order adds liquidity or removes it.
Margin TradingCeFi: Borrowing funds on an exchange to open a larger crypto position than your own balance would allow, increasing both potential gains and losses.
Market OrderCrypto Trading: An order to buy or sell a cryptocurrency immediately at the best available price on the exchange.
Meme CycleMemecoins: A recurring pattern where attention, humor, social media buzz, and speculation push memecoins or meme themes through rapid rises and fades.
MemecoinMemecoins: A memecoin is a cryptocurrency inspired by an internet joke, meme, or community trend, often valued more by social attention than technical utility.
MempoolBitcoin: A mempool is a node’s waiting area for valid but unconfirmed transactions before they are included in a block.
Merkle TreeCryptography & Privacy: A Merkle tree is a hash-based data structure that lets many pieces of data be verified efficiently and securely.
MetaverseMetaverse: A metaverse is a shared digital environment where people use avatars to socialize, play, create, and trade virtual goods or experiences.
MiCARegulation & Tax: The EU’s Markets in Crypto-Assets Regulation sets common rules for crypto issuers, exchanges, custodians, and certain stablecoins.
Mining PoolBitcoin: A mining pool is a group of miners who combine computing power to improve their chances of earning block rewards.
Mining RigMining: A specialized computer setup used to run mining software and perform the calculations needed to secure proof-of-work blockchains.
Mint (NFT)NFTs & Gaming: Creating an NFT by recording a unique token on a blockchain and linking it to its metadata, such as an image, video, or game item.
Modular BlockchainLayer 2 & Scaling: A blockchain design that splits core jobs like execution, settlement, consensus, and data availability across separate specialized layers.
Money MarketDeFi: A DeFi money market is a lending and borrowing pool where users supply crypto to earn interest or borrow against collateral.
Moving AverageTechnical Analysis: A moving average smooths price data over a chosen period to help traders see the market’s overall direction more clearly.
Multi-Party ComputationCryptography & Privacy: A cryptographic method that lets multiple parties jointly compute a result without revealing their private inputs to each other.
MultisigWallets & Security: A wallet setup that requires multiple private-key approvals before a crypto transaction can be executed.
Multisig TreasuryDAOs & Governance: A shared crypto fund controlled by a wallet that requires multiple approved signers to authorize transactions.

N

NFTNFTs & Gaming: A unique blockchain-based token that represents ownership or proof of authenticity for a specific digital or physical item.
NFT RevealNFTs & Gaming: The moment when a newly minted NFT’s hidden artwork, traits, or metadata are made visible to holders and the public.
NFT RoyaltyNFTs & Gaming: A resale fee paid to an NFT creator or rights holder when the NFT is sold again on a marketplace.
Non-Custodial WalletWallets & Security: A wallet where you control the private keys or seed phrase, so no exchange or third party can move your crypto for you.
NonceBlockchain Fundamentals: A nonce is a number used once in cryptography or blockchains to make data unique and help miners, validators, or wallets process it safely.

O

Off-Chain VoteDAOs & Governance: A vote conducted outside a blockchain to signal community preference without directly executing an on-chain transaction.
On-Chain BondsReal World Assets (RWA): Debt instruments issued, recorded, or managed on a blockchain, often as tokenized versions of traditional bonds.
On-Chain VoteDAOs & Governance: A blockchain-recorded governance vote where token holders or members use wallets to approve or reject a proposal.
Open MetaverseMetaverse: A shared vision of interoperable virtual worlds where users can carry identities, assets, and creations across platforms.
Optimistic RollupLayer 2 & Scaling: A layer 2 scaling method that processes transactions off-chain and posts summarized data to a main blockchain, assuming transactions are valid unless challenged.
OracleDeFi: A service that brings real-world or off-chain data onto a blockchain so smart contracts can use it.
Order BookCrypto Trading: A live list of buy and sell orders for a crypto asset on an exchange, showing prices, amounts, and market depth.
Order Book DepthExchanges & Platforms: A measure of how many buy and sell orders are available at different prices on an exchange, showing how easily a market can absorb trades.
OrdinalsBitcoin: A Bitcoin protocol that numbers individual satoshis and can attach data to them, enabling NFT-like collectibles and other on-chain artifacts.
Orphan BlockMining: A valid mined block that is not included in the main blockchain because a competing block was accepted by the network first.
Outcome TokenPrediction Markets: A digital token that represents a specific possible result in a prediction market and pays out if that result is confirmed.

P

Passkey WalletWallets & Security: A crypto wallet that lets users create or approve transactions with a passkey, such as a device PIN, fingerprint, or face scan, instead of a seed phrase.
Pectra UpgradeEthereum: An Ethereum network upgrade that improves wallets, validator operations, and data capacity by updating both the execution and consensus layers.
PegStablecoins: A peg is a target value that a stablecoin or crypto asset is designed to maintain relative to another asset, such as the US dollar.
PermissionlessBlockchain Fundamentals: Describes a blockchain or protocol that anyone can access, use, or build on without needing approval from a central authority.
Perpetual DEXDeFi: A decentralized exchange for trading perpetual futures contracts directly from a crypto wallet, usually with leverage and no fixed expiry date.
Perpetual FutureCrypto Trading: A crypto derivatives contract that lets traders speculate on an asset’s price without an expiry date.
Phishing (Crypto)Wallets & Security: A scam that tricks people into revealing crypto wallet keys, seed phrases, passwords, or approvals so attackers can steal funds.
PlasmaLayer 2 & Scaling: A layer 2 scaling design that moves transactions to child chains while using the main blockchain for security and dispute resolution.
Play-to-EarnNFTs & Gaming: A game model where players can earn crypto tokens, NFTs, or other digital assets through gameplay and in-game activity.
Portfolio AllocationCrypto Investing: The way an investor divides their crypto holdings across different assets, sectors, or risk levels.
Prediction MarketPrediction Markets: A prediction market is a trading venue where people buy and sell contracts tied to the outcome of future events.
PresaleTokenomics & Launches: A presale is an early token sale held before a public launch, usually offering tokens to selected buyers or early supporters under specific terms.
Private KeyCryptography & Privacy: A private key is a secret cryptographic code that proves ownership and authorizes transactions from a crypto wallet.
Proof of StakeMining: A consensus method where validators lock up cryptocurrency to help secure a blockchain and earn rewards for proposing or verifying blocks.
Proof of WorkMining: A consensus method where miners use computing power to solve puzzles, helping secure a blockchain and add new transactions.
Public KeyCryptography & Privacy: A public key is a shareable cryptographic code used to receive funds or verify digital signatures without revealing the matching private key.
Pump and DumpMemecoins: A coordinated scheme where a token’s price is artificially inflated, then sold off by insiders for profit, leaving late buyers with losses.

Q

Quorum (DAO)DAOs & Governance: The minimum level of voter participation required for a DAO proposal to be considered valid and eligible to pass.

R

RPC EndpointWeb3 & Development: A network address that lets apps send requests to a blockchain node to read data, submit transactions, or interact with smart contracts.
RSITechnical Analysis: RSI is a momentum indicator that measures how quickly and strongly an asset’s price has moved to help spot overbought or oversold conditions.
RWA (Real World Asset)Real World Assets (RWA): A real world asset is a physical or traditional financial asset represented on a blockchain, often through a token.
Real YieldDeFi: Yield in DeFi that comes from a protocol’s actual revenue, such as trading fees or lending interest, rather than newly issued token rewards.
Resolution SourcePrediction Markets: A resolution source is the official reference used to decide the outcome of a prediction market after the event occurs.
RestakingDeFi: Restaking is the practice of using already-staked crypto to help secure additional networks or services and potentially earn extra rewards.
Retail CBDCCBDCs: A retail CBDC is digital central bank money designed for everyday use by the public, similar to digital cash.
Ring SignatureCryptography & Privacy: A privacy-preserving digital signature that proves one member of a group signed a message without revealing which member it was.
Risk-On / Risk-OffMacroeconomics & Crypto: A market mood framework describing when investors favor higher-risk assets or move toward safer assets.
RollupLayer 2 & Scaling: A rollup is a Layer 2 scaling system that processes many blockchain transactions off-chain and posts a compressed summary back to the main chain.
Rug PullWallets & Security: A scam where a crypto project’s creators suddenly drain funds, abandon the project, or make a token impossible to sell.

S

SatoshiBitcoin: The smallest unit of bitcoin, equal to 0.00000001 BTC.
Seed PhraseWallets & Security: A seed phrase is a list of words that backs up a crypto wallet and can restore access to its private keys and funds.
SegWitBitcoin: A Bitcoin upgrade that changes how transaction signature data is stored, making transactions smaller to process and fixing transaction malleability.
SequencerLayer 2 & Scaling: A sequencer is a system in a Layer 2 network that orders user transactions and batches them before they are submitted to the base blockchain.
ShardingEthereum: Sharding is a scaling method that splits blockchain data or work into smaller parts so the network can process more activity in parallel.
Short PositionCrypto Trading: A trade that aims to profit when a cryptocurrency’s price falls, usually by borrowing, selling, and later buying it back cheaper.
SidechainLayer 2 & Scaling: A separate blockchain connected to a main blockchain, allowing assets or data to move between them while using its own rules and security model.
Slash RiskStaking & Yield: The chance that staked crypto is penalized or partly confiscated because a validator breaks network rules or fails to perform correctly.
SlashingEthereum: A penalty in proof-of-stake networks where a validator loses staked crypto for serious rule violations or harmful behavior.
SlippageDeFi: The difference between the price you expect for a trade and the price you actually get when it is executed.
Smart ContractBlockchain Fundamentals: A smart contract is code on a blockchain that automatically runs agreed rules when specified conditions are met.
Smart Contract WalletWallets & Security: A crypto wallet controlled by code on a blockchain, enabling programmable features like recovery, spending limits, and multi-user approvals.
Snapshot VoteDAOs & Governance: A governance poll that counts voting power from token balances at a specific blockchain block, often used by DAOs for gasless off-chain decisions.
Social RecoveryWallets & Security: A wallet recovery method that lets trusted people or devices help restore access if you lose your private key or password.
Soft ForkBlockchain Fundamentals: A blockchain rule change that tightens or adds restrictions while remaining compatible with nodes that have not upgraded.
SolidityEthereum: A programming language used to write smart contracts, especially on Ethereum and other EVM-compatible blockchains.
Soulbound TokenNFTs & Gaming: A non-transferable digital token that represents an identity, credential, achievement, or membership tied to a specific wallet.
SpreadCrypto Trading: The difference between the highest price buyers are offering and the lowest price sellers are asking for an asset.
StablecoinStablecoins: A cryptocurrency designed to keep a relatively stable value, usually by tracking an asset such as the U.S. dollar.
StableswapDeFi: A type of automated market maker designed to swap similarly priced assets, such as stablecoins, with low slippage and efficient liquidity use.
StakingStaking & Yield: Staking is the process of locking or delegating crypto to help secure a proof-of-stake blockchain and potentially earn rewards.
Stale BlockMining: A valid mined block that loses a temporary race with another block and is not included in the blockchain’s main history.
State ChannelLayer 2 & Scaling: A state channel is a Layer 2 method that lets users make many off-chain updates and settle only the final result on a blockchain.
Stop LossCrypto Trading: An order that automatically sells or closes a position when the price reaches a preset level to help limit potential losses.
Storage NetworkDePIN: A decentralized system that stores and retrieves data across many independent computers instead of relying on one company’s servers.
Stratum ProtocolMining: A communication protocol that lets cryptocurrency miners connect to mining pools, receive work, and submit proof-of-work results efficiently.
SubgraphWeb3 & Development: A subgraph is a configuration that tells an indexing protocol how to collect, organize, and query blockchain data for an application.
Support and ResistanceTechnical Analysis: Price zones where a crypto asset has historically tended to stop falling or stop rising as buyers or sellers become more active.

T

TVLDeFi: TVL is the total value of crypto assets deposited in a DeFi protocol, app, or blockchain ecosystem.
Take ProfitCrypto Trading: A take profit is an order or target price used to automatically close a trade once it reaches a chosen level of profit.
TaprootBitcoin: A Bitcoin upgrade that improves privacy, efficiency, and flexibility for complex transactions by making many spending conditions look like normal payments.
The MergeEthereum: Ethereum’s upgrade that replaced proof-of-work mining with proof-of-stake validation while keeping the network’s history and user balances intact.
Token AllocationTokenomics & Launches: The planned distribution of a crypto project’s tokens among groups such as investors, founders, team members, users, and community incentives.
Token BurnTokenomics & Launches: A token burn permanently removes tokens from circulation, usually by sending them to an unusable blockchain address.
Token ListingExchanges & Platforms: A token listing is the addition of a cryptocurrency token to an exchange or trading platform so users can buy, sell, or trade it.
Tokenized Real EstateReal World Assets (RWA): Real estate ownership or related rights represented as blockchain tokens that can be transferred, tracked, or traded digitally.
Tokenized TreasuriesReal World Assets (RWA): Digital tokens that represent ownership or exposure to short-term government debt, typically U.S. Treasury bills, on a blockchain.
TokenomicsTokenomics & Launches: The design of a crypto token’s supply, distribution, incentives, and rules that influence how it may be used and valued.
Top Market Cap CoinAltcoins: A cryptocurrency ranked among the largest by market capitalization, calculated by multiplying its price by its circulating supply.
Trading PairExchanges & Platforms: A trading pair shows two assets that can be exchanged for each other on a crypto exchange, such as BTC/USDT or ETH/BTC.
Travel RuleRegulation & Tax: A compliance rule requiring crypto service providers to share sender and recipient information for certain transfers.
TrendlineTechnical Analysis: A trendline is a straight line drawn on a price chart to show the general direction of an asset’s movement.

U

USDCStablecoins: A dollar-pegged stablecoin issued by Circle and designed to track the value of one U.S. dollar.
USDTStablecoins: USDT is a U.S. dollar-pegged stablecoin issued by Tether and widely used to move value between crypto markets.
UTXOBitcoin: A UTXO is an unspent transaction output, a chunk of bitcoin that can be used as an input in a future transaction.

V

ValidatorEthereum: A validator is a network participant that helps secure a proof-of-stake blockchain by checking transactions, proposing blocks, and attesting to valid blocks.
Validity ProofLayer 2 & Scaling: A cryptographic proof showing that off-chain transactions or computations were executed correctly without redoing them on-chain.
Vault (DeFi)DeFi: A DeFi vault is a smart contract that pools user funds and automatically applies a defined yield, lending, or trading strategy.
VestingTokenomics & Launches: A scheduled release of tokens over time, often used to limit when founders, employees, investors, or community members can sell or transfer them.
Virtual LandMetaverse: A blockchain-based digital plot or space within a metaverse platform that users can own, customize, trade, or use for online experiences.

W

WalletConnectWeb3 & Development: An open-source protocol that lets crypto wallets connect securely to decentralized apps without sharing private keys.
Wash Sale Rule (Crypto)Regulation & Tax: A tax rule concept that can limit loss deductions when an asset is sold at a loss and a substantially identical asset is repurchased soon after.
Web3Web3 & Development: A vision of the internet where users interact with apps and services through blockchain-based ownership, identity, and value transfer.
Whitelist (NFT)NFTs & Gaming: A whitelist is a pre-approved list of wallet addresses that can access an NFT mint, sale, or feature before or instead of the public.
Whitepaper (Crypto)Altcoins: A document that explains a crypto project’s goals, technology, token design, and roadmap so readers can evaluate what is being built.
Wholesale CBDCCBDCs: A wholesale CBDC is central bank digital money designed for use by banks and other financial institutions, not the general public.
Wireless DePINDePIN: A decentralized network where individuals deploy wireless hardware and earn crypto rewards for providing connectivity or coverage.

Y

Yield AggregatorDeFi: A DeFi tool that automatically moves or manages deposited crypto across yield strategies to seek better returns while reducing manual effort.
Yield CurveMacroeconomics & Crypto: A yield curve is a chart showing the interest rates investors earn on debt with different maturities, often used to read market expectations.
Yield FarmingDeFi: Yield farming is the practice of using crypto assets in DeFi protocols to earn rewards, often by providing liquidity or lending tokens.

Z

ZK-RollupLayer 2 & Scaling: A layer 2 scaling method that bundles many blockchain transactions and proves their validity with zero-knowledge proofs.
Zero-Knowledge ProofCryptography & Privacy: A cryptographic method that lets someone prove a statement is true without revealing the underlying information that makes it true.
zk-SNARKCryptography & Privacy: A zk-SNARK is a compact zero-knowledge proof that lets someone prove a statement is true without revealing the underlying data.
zk-STARKCryptography & Privacy: A zero-knowledge proof system that lets someone prove a computation is correct without revealing the underlying data, using transparent, hash-based cryptography.

Frequently Asked Questions

How often is this glossary updated?: We review every entry at least once per quarter and add new terms whenever the industry adopts them. Each definition shows its last-updated date on its detail page, so you can always tell how fresh the information is.
Who writes the definitions?: Definitions are drafted in-house by the itokenly editorial team and verified by Marcus Reynolds, our senior crypto editor. We cross-check every entry against primary sources (whitepapers, protocol docs, and academic papers) before publishing.
What's the difference between a glossary entry and a full guide?: Glossary entries are short reference definitions (1-2 paragraphs) optimized for quickly answering "what does X mean?". Full guides go deeper — explaining how something works, when to use it, and what to watch out for. We link from glossary entries to relevant in-depth guides.
Do you cover NFT, DeFi, and Layer 2 terms?: Yes. The glossary spans 29 categories including Bitcoin, Ethereum, DeFi, NFTs and gaming, wallets and security, layer 2 and scaling, mining, regulation, privacy and cryptography, stablecoins, prediction markets, RWAs, AI x crypto, DePIN, CBDCs, and more. Use the category filter or alphabet navigation to find what you need.
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I noticed a missing or inaccurate term. Can I report it?: Absolutely — corrections from readers are how we keep the glossary sharp. Email the editorial team and we'll respond within a few business days. We credit contributors who supply factual corrections that lead to a published edit.
How is each definition verified?: Every entry passes through a two-step check: an editor cross-references the term against at least one primary source (protocol docs, whitepaper, or peer-reviewed paper) and one independent secondary source (technical blog, academic site, or industry publication). Disputed or evolving terminology is flagged.

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