DeFi Glossary 2025: 50+ Essential Terms Every Crypto User Should Know

DeFi has its own language. If you have ever felt lost in a conversation about "impermanent loss on an AMM LP position," this glossary is for you. We have compiled over 50 essential terms, explained in plain English.

Bookmark this page. You will come back to it.

A

Account Abstraction (AA) A smart contract-based wallet model that enables features like social recovery, gasless transactions, and multi-signature security. Replaces traditional externally owned accounts (EOAs) with programmable smart wallets.

Airdrop Free distribution of tokens to wallet addresses, typically to reward early users, promote adoption, or decentralize governance. Often retroactive — rewarding past activity you have already done.

AMM (Automated Market Maker) A type of decentralized exchange that uses mathematical formulas and liquidity pools instead of order books to facilitate trading. Uniswap and Velodrome are popular AMMs.

APR (Annual Percentage Rate) The simple annual interest rate earned or paid, without compounding. If you earn 10% APR on $1,000, you earn $100 per year.

APY (Annual Percentage Yield) The annual return accounting for compound interest. Higher than APR when rewards are reinvested. A 10% APY with daily compounding yields more than 10% APR.

Audit A professional security review of smart contract code by a specialized firm. Audits identify vulnerabilities but do not guarantee a protocol is exploit-free.

B

Block A bundle of transactions that are processed and added to the blockchain together. Each block references the previous one, forming a chain.

Bridge A protocol that enables transferring assets between different blockchains. Bridges lock tokens on one chain and mint equivalent tokens on another.

Burn Permanently removing tokens from circulation by sending them to an inaccessible address. Burns reduce supply, which can increase the value of remaining tokens.

C

CEX (Centralized Exchange) A crypto exchange operated by a company that custodies user funds. Examples: Coinbase, Kraken, Binance. Contrast with DEX.

Collateral Assets deposited as security for a loan. In DeFi lending, borrowers typically provide 150%+ of the loan value in collateral to protect lenders.

Composability The ability of DeFi protocols to interact with each other. Often called "money legos" — you can combine lending, swapping, and yield farming in a single transaction.

Concentrated Liquidity An AMM feature (introduced by Uniswap V3) where LPs provide liquidity within a specific price range rather than across the entire price spectrum. Higher capital efficiency but requires active management.

D

DAO (Decentralized Autonomous Organization) An organization governed by smart contracts and token holder votes rather than a traditional corporate structure. Protocol governance decisions (fees, upgrades) often go through a DAO.

dApp (Decentralized Application) An application built on a blockchain using smart contracts. Otomate is a dApp that provides trading automation on Ink Chain.

DeFi (Decentralized Finance) Financial services built on blockchain technology, operating without traditional intermediaries like banks. Includes trading, lending, borrowing, and more.

DEX (Decentralized Exchange) An exchange where trades execute through smart contracts rather than a centralized company. Users trade directly from their wallets. Examples: Uniswap, Velodrome, InkySwap.

DEX Aggregator A protocol that routes trades across multiple DEXs to find the best price. 0x is a DEX aggregator used on Ink Chain and many other networks.

E

EIP (Ethereum Improvement Proposal) A formal proposal for changes to the Ethereum protocol. EIP-1559 reformed gas fee mechanics. EIP-4844 reduced L2 data costs.

ERC-20 The standard token interface on Ethereum and compatible chains. Most fungible tokens (USDC, USDT, UNI) are ERC-20 tokens.

EVM (Ethereum Virtual Machine) The computational engine that executes smart contracts on Ethereum and compatible chains. "EVM-compatible" chains (like Ink Chain) can run the same smart contracts as Ethereum.

F

Flash Loan An uncollateralized loan that must be borrowed and repaid within a single transaction. Used for arbitrage, liquidations, and unfortunately, some exploits.

Frontrunning Placing a transaction ahead of another pending transaction to profit from the price impact. A form of MEV extraction.

Funding Rate In perpetual futures, a periodic payment between long and short traders that keeps the contract price aligned with the spot price. Positive funding means longs pay shorts; negative means shorts pay longs.

G

Gas The unit measuring computational work required for a blockchain transaction. Gas fees compensate validators for processing transactions.

Governance Token A token that grants holders voting rights in a protocol's DAO. Holders can vote on fee changes, upgrades, treasury allocation, and other protocol decisions.

H

Hardware Wallet A physical device that stores private keys offline. Considered the most secure way to hold crypto for long-term storage.

Hot Wallet A crypto wallet connected to the internet. Convenient for daily DeFi use but more vulnerable to attacks than cold storage.

I

Impermanent Loss (IL) The reduction in value that liquidity providers experience when the price ratio of pooled tokens changes. Called "impermanent" because it reverses if prices return to the original ratio.

K

KYC (Know Your Customer) Identity verification required by centralized exchanges and some regulated platforms. DeFi protocols typically do not require KYC.

L

Layer 1 (L1) The base blockchain (e.g., Ethereum, Bitcoin, Solana). Handles final settlement and security.

Layer 2 (L2) A blockchain built on top of an L1 to improve speed and reduce costs. Ink Chain is an L2 built on Ethereum. Other examples: Arbitrum, Base, Optimism.

Liquidation The forced closing of a leveraged position when collateral falls below the required threshold. In DeFi lending, your collateral is sold if its value drops too much.

Liquidity The ease of buying or selling an asset without significantly affecting its price. Deep liquidity means large trades can execute with minimal slippage.

Liquidity Pool (LP) A smart contract holding pairs of tokens that facilitate DEX trading. Liquidity providers deposit tokens and earn fees from swaps.

M

MEV (Maximal Extractable Value) The profit that block producers and searchers can extract by reordering, inserting, or censoring transactions. Includes frontrunning, sandwich attacks, and arbitrage.

Multi-sig A wallet or contract requiring multiple private key signatures to authorize a transaction. Used for protocol admin functions and treasury management. Example: a 3-of-5 multi-sig requires 3 out of 5 keyholders to approve.

N

Non-Custodial A system where users retain control of their private keys and assets. Otomate is non-custodial — your funds remain in your wallet when using trading automation on Ink Chain.

O

Oracle A service that feeds external data (like prices) to smart contracts. Chainlink and Pyth are leading oracle providers. Critical for DeFi protocols that need real-world price data.

Order Book A list of buy and sell orders for an asset, organized by price. Traditional exchanges and some on-chain protocols (like Nado Protocol) use order books.

P

Perpetual Futures (Perps) Derivative contracts that let you trade with leverage and no expiration date. Priced near the spot price via funding rate payments between longs and shorts.

Private Key A cryptographic key that proves ownership of a blockchain address and authorizes transactions. Losing your private key means losing your funds permanently.

Protocol A set of smart contracts that provide a specific DeFi service. Nado Protocol provides perpetual futures trading on Ink Chain.

R

Rollup A Layer 2 scaling solution that processes transactions off-chain and posts compressed data to the L1. Optimistic rollups (like Ink Chain) assume transactions are valid; ZK-rollups provide cryptographic proofs.

Rug Pull A scam where project creators abandon a protocol after draining liquidity or user funds. More common with unaudited, anonymous-team projects.

S

Seed Phrase (Recovery Phrase) A 12 or 24-word backup that can restore your crypto wallet. Must be stored securely offline. Anyone with your seed phrase can access your funds.

Slippage The difference between the expected price of a trade and the actual execution price. Higher slippage occurs with large trades or low-liquidity pools.

Smart Contract Self-executing code deployed on a blockchain that automatically enforces the terms of an agreement. The foundation of all DeFi protocols.

Stablecoin A cryptocurrency designed to maintain a stable value, typically pegged to the US dollar. USDC, USDT, and DAI are the most widely used stablecoins.

T

Timelock A smart contract mechanism that delays admin actions by a set period (usually 24-48 hours). Gives users time to exit before changes take effect. A key security feature.

TVL (Total Value Locked) The total value of assets deposited in a DeFi protocol. A common metric for measuring protocol adoption and trust.

TWAP (Time-Weighted Average Price) An average price calculated over a specific time period. Used by some protocols to resist price manipulation.

V

Vault A smart contract that automates a DeFi strategy, such as auto-compounding yield farming rewards. Users deposit tokens and the vault manages the rest.

W

Wallet Software or hardware that stores your private keys and lets you interact with the blockchain. See our wallet guide for a deep dive.

Whale An individual or entity holding a large amount of a particular cryptocurrency. Whale transactions can significantly impact market prices.

Wrapped Token A token that represents another asset on a different blockchain. Wrapped ETH (wETH) is an ERC-20 version of ETH, needed because native ETH predates the ERC-20 standard.

Y

Yield The return earned on deposited assets, expressed as APR or APY. Sources include trading fees, interest, and token incentives.

Yield Farming The strategy of moving assets between DeFi protocols to maximize returns. See our yield farming guide for details.

Z

Zero-Knowledge Proof (ZKP) A cryptographic method that proves something is true without revealing the underlying data. Used in ZK-rollups to prove transaction validity without re-executing every transaction on L1.

This glossary is maintained by the Otomate team. We build non-custodial trading automation on Ink Chain. Don't trade. Automate. Get started