DeFi Glossary 2026: 100 Essential Terms Every Crypto User Needs to Know
DeFi has its own vocabulary — TVL, MEV, AMM, LP, IL, and dozens more. This comprehensive glossary defines the 100 most important DeFi terms with clear, practical explanations.
DeFi is full of jargon that creates an unnecessary barrier for newcomers. This glossary defines the most important terms in plain language, with context on why each concept matters for your DeFi activity.
Protocol and Architecture Terms
- AMM (Automated Market Maker): DEX using formulas instead of order books to set prices
- TVL (Total Value Locked): USD value of assets deposited in a DeFi protocol
- L1/L2 (Layer 1/2): L1 is the base blockchain; L2 processes transactions faster/cheaper and settles to L1
- Oracle: external data feed bringing real-world prices to smart contracts (Chainlink)
- Composability: DeFi protocols can be combined like Lego blocks to create new products
Trading and Yield Terms
- APY (Annual Percentage Yield): yearly return including compounding
- Impermanent Loss (IL): loss from price divergence in LP positions relative to holding
- Slippage: difference between expected and actual trade execution price
- MEV (Maximal Extractable Value): profit extracted by reordering transactions in a block
- Funding Rate: periodic payment between perp longs and shorts to keep price near spot
Token and Economics Terms
- Vesting: token release schedule that prevents immediate selling by insiders
- FDV (Fully Diluted Valuation): current price × maximum token supply
- Tokenomics: the economic design of a token including supply, distribution, and utility
- veToken: vote-escrowed token; locked for time to gain governance power and yield boost
- Airdrop: free token distribution to qualifying wallet addresses
Security Terms
- Rug pull: developers drain liquidity pool and abandon project
- Flash loan: uncollateralized loan repaid within same transaction
- Honeypot: token with hidden sell restriction that traps buyers
- Multisig: wallet requiring multiple signatures to authorize transactions
- Slashing: penalty applied to PoS validators for misbehavior