D

Glossary

Blockchain & Web3 Glossary

A comprehensive glossary of blockchain, cryptocurrency, DeFi, and Web3 terms. From basic concepts to advanced protocol mechanics.

Airdrop

Free distribution of tokens to wallet addresses, typically used as a marketing strategy or to reward early users of a protocol.

TokenWallet

AMM (Automated Market Maker)

A decentralized exchange mechanism that uses mathematical formulas to price assets instead of an order book. Liquidity providers deposit pairs of tokens into pools that traders swap against.

DEXLiquidity PoolImpermanent Loss

Bridge

A protocol that enables the transfer of assets between different blockchain networks, such as moving ETH from Ethereum to an L2 like Arbitrum.

Layer 2Cross-chain

DAO (Decentralized Autonomous Organization)

An organization governed by smart contracts and token-holder votes rather than a traditional management hierarchy. Members propose and vote on decisions using governance tokens.

Governance TokenSmart Contract

DeFi (Decentralized Finance)

Financial services built on blockchain networks that operate without traditional intermediaries like banks. Includes lending, borrowing, trading, and yield farming protocols.

AMMYield FarmingLiquidity Pool

Flash Loan

An uncollateralized loan that must be borrowed and repaid within a single blockchain transaction. Used for arbitrage, liquidations, and collateral swaps. If the loan isn't repaid in the same transaction, the entire operation reverts.

DeFiSmart ContractLiquidity Pool

Gas

A unit measuring the computational effort required to execute transactions on a blockchain. Users pay gas fees to validators for processing their transactions.

TransactionValidatorEIP-1559

Governance Token

A token that grants holders voting rights over a protocol's development, treasury allocation, and parameter changes. Examples include UNI (Uniswap), AAVE, and MKR (MakerDAO).

DAOTokenomicsDeFi

Impermanent Loss

The temporary loss of funds experienced by liquidity providers when the price ratio of deposited tokens changes compared to simply holding them. Becomes permanent if the provider withdraws at the changed ratio.

AMMLiquidity Pool

Layer 1 (L1)

The base blockchain network that provides the foundational consensus and security layer. Examples include Ethereum, Bitcoin, Solana, and Avalanche. All transactions ultimately settle on Layer 1.

Layer 2ValidatorProof of StakeProof of Work

Layer 2 (L2)

A secondary protocol built on top of a Layer 1 blockchain (like Ethereum) to improve scalability and reduce costs. Examples include Arbitrum, Optimism, and zkSync.

RollupBridgeLayer 1

Liquidity Pool

A smart contract holding a pair of tokens that enables decentralized trading. Liquidity providers deposit equal values of two tokens and earn a share of trading fees in return.

AMMImpermanent LossDeFiYield Farming

MEV (Maximal Extractable Value)

The maximum value that can be extracted from block production beyond the standard block reward and gas fees, by including, excluding, or reordering transactions within a block.

ValidatorTransactionFlashbots

NFT (Non-Fungible Token)

A unique digital asset stored on a blockchain that represents ownership of a specific item — artwork, collectible, game item, or real-world asset. Unlike fungible tokens, each NFT is distinct.

TokenSmart ContractMetadata

Oracle

A service that feeds external, real-world data (prices, weather, sports scores) to smart contracts on a blockchain. Chainlink is the most widely used oracle network.

Smart ContractDeFi

Proof of Stake (PoS)

A consensus mechanism where validators lock up (stake) cryptocurrency as collateral to earn the right to validate transactions and create new blocks. Validators are selected based on stake size and other factors. More energy-efficient than Proof of Work.

ValidatorStakingProof of WorkLayer 1

Proof of Work (PoW)

A consensus mechanism where miners compete to solve complex mathematical puzzles to validate transactions and create new blocks. The first to solve the puzzle earns the block reward. Used by Bitcoin and known for high energy consumption.

Proof of StakeLayer 1Gas

Rollup

A Layer 2 scaling solution that executes transactions off-chain but posts transaction data back to Layer 1 for security. Two types: optimistic rollups (assume valid, allow challenges) and zero-knowledge rollups (provide cryptographic proofs).

Layer 2Zero-Knowledge Proof

RWA (Real-World Assets)

Physical or traditional financial assets — such as real estate, treasuries, commodities, or private credit — that have been tokenized and brought on-chain. Enables fractional ownership, 24/7 trading, and programmable compliance.

TokenSmart ContractDeFi

Slippage

The difference between the expected price of a trade and the actual executed price. Occurs due to low liquidity, large order sizes, or price movement between submission and execution. Most DEXs let users set a maximum slippage tolerance.

AMMLiquidity PoolDEX

Smart Contract

Self-executing code stored on a blockchain that automatically enforces the terms of an agreement when predetermined conditions are met. The foundation of DeFi, NFTs, and DAOs.

SolidityDeFiDAO

Staking

Locking up cryptocurrency to support network operations (like validating transactions in Proof of Stake) in exchange for rewards. Similar in concept to earning interest.

Proof of StakeValidatorYield

Tokenomics

The economic model and design of a cryptocurrency token, including supply schedule, distribution, utility, governance rights, and incentive mechanisms.

TokenGovernance TokenVesting

TVL (Total Value Locked)

The total value of assets deposited in a DeFi protocol, measured in USD. Used as a key metric to compare the size and adoption of different protocols.

DeFiLiquidity Pool

Validator

A node operator that participates in a Proof of Stake network by staking tokens and verifying transactions. Validators propose and attest to new blocks, earning rewards for honest participation and facing slashing penalties for misbehavior.

Proof of StakeStakingLayer 1

Wallet (Hot/Cold)

Software or hardware used to store, send, and receive cryptocurrency. Hot wallets are connected to the internet (e.g., MetaMask, Phantom) for convenience. Cold wallets are offline (e.g., Ledger, Trezor) for maximum security.

TokenGasSmart Contract

Yield Farming

The practice of strategically moving assets between DeFi protocols to maximize returns. Farmers earn rewards from trading fees, protocol incentives, and governance tokens.

DeFiAMMLiquidity PoolAPY

Zero-Knowledge Proof

A cryptographic method that allows one party to prove they know something without revealing the underlying information. Used in privacy-focused blockchains and efficient L2 scaling solutions (zkRollups).

RollupLayer 2Privacy

Pro Tips

  • 01If you can't explain a protocol's value proposition without using any of these terms, you don't understand it well enough to invest in it
  • 02Most 'Web3' projects are just databases with extra steps. The litmus test: does this actually need to be decentralized? If the answer is no, it's a marketing play
  • 03Tokenomics is the single best predictor of whether a project will retain value. High inflation + low utility = slow death. Study the emission schedule before you buy
  • 04The crypto market moves in 4-year cycles driven by Bitcoin halvings. Understanding where you are in the cycle matters more than any individual project analysis
  • 05DeFi yields above 20% APY are either temporary (liquidity mining incentives) or hiding risk (impermanent loss, smart contract exploits). There is no free lunch
By David Shadrake · Free, no signup required

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David Shadrake

David Shadrake works on strategic business development and tech partnerships, with focus areas across AI, fintech, venture capital, growth, sales, SEO, blockchain, and broader tech innovation. Read more of his perspective on partnerships, market dynamics, and emerging technology at davidshadrake.com.