Crypto Glossary: Every Term in Crypto Explained

Crypto has its own language. A single paragraph about Bitcoin or Ethereum can contain half a dozen terms that mean nothing to anyone outside the space, and the pace of new vocabulary is relentless. This glossary is a plain English reference for everything you are likely to encounter. Use the A to Z navigation, the live search box, or just scroll. Every term has its own page with a short definition up top and enough context below to actually understand what is going on.

How to Use This Glossary

Look it up as you read. The most common use case is running into a term in an article and wanting a quick definition. Type the term into the search box at the top of this page and you will get a direct link to the entry. Every definition fits in one screen and every entry is linked from a permanent URL that you can bookmark or share.

Browse by letter. If you are new to crypto and want to get oriented, the A to Z index is the fastest way to discover the vocabulary. Start at A and skim — you do not need to read every entry, but scrolling the list will give you a sense of what exists and what you might want to come back to later.

Follow the cross links. Almost every entry links to two or three related terms at the bottom. That is how a glossary becomes more than a dictionary — following the links is the fastest way to build a mental model of how different concepts connect. Start at “Bitcoin”, follow to “Proof of Work”, then “Mining”, then “ASIC”, and in five minutes you have a rough understanding of how Bitcoin’s consensus layer actually works.

What This Glossary Covers

The entries span the full stack of what people mean when they say “crypto”:

Core blockchain concepts. Block, chain, hash, nonce, mining, nodes, consensus, finality, fork, genesis block, Merkle tree. The plumbing that makes a blockchain a blockchain. These are the terms you need to understand any article about how a cryptocurrency actually works under the hood.

Bitcoin specifically. Satoshi, halving, UTXO, Lightning Network, SegWit, Taproot, multisig, mempool, difficulty. Bitcoin has its own dialect because it has been around longer than anything else and its vocabulary predates the rest of crypto. Many of these terms apply only to Bitcoin or to Bitcoin derived chains.

Ethereum and smart contracts. Gas, EVM, wei, gwei, ERC-20, ERC-721, ABI, calldata, reentrancy, solidity. Ethereum introduced the idea of a programmable blockchain and with it an entire second vocabulary built around smart contracts, tokens and execution environments.

DeFi. AMM, liquidity pool, impermanent loss, yield farming, flash loan, LP token, TVL, slippage, total value locked, collateral ratio, liquidation, stablecoin, peg, DEX, aggregator. Decentralised finance reinvented the entire financial system vocabulary inside eight years and most of these terms did not exist before 2020.

NFTs and Web3. NFT, mint, floor price, royalty, metadata, on chain art, profile picture (PFP) collection, rarity, reveal, whitelist, allowlist. The NFT boom brought another wave of new words, some of which have stuck and some of which are already fossilising.

Scaling and infrastructure. Layer 1, Layer 2, rollup, optimistic rollup, zkRollup, sidechain, bridge, data availability, sequencer, validium, plasma. How blockchains scale is one of the most technical and most jargon heavy corners of crypto, and the vocabulary here changes faster than anywhere else.

Trading and market terms. HODL, whale, pump, dump, rug pull, moonshot, bag holder, DYOR, FUD, FOMO, to the moon, wen lambo. The culture side of crypto has its own vernacular that is used unironically enough that not knowing the terms is a real disadvantage if you read any crypto discussion online.

Wallets and security. Seed phrase, private key, public key, hardware wallet, cold storage, hot wallet, custodial, non custodial, multi sig, social recovery, shard, passkey. Security vocabulary is the one part of crypto where getting the definitions right actually matters for your money.

Regulatory and macro. KYC, AML, FATF travel rule, MiCA, spot ETF, custody, qualified custodian, accredited investor. The legal and regulatory corner of crypto is growing fast and its vocabulary is borrowed from traditional finance with a crypto twist.

How the Definitions Are Written

Every entry follows the same rough shape. The first paragraph is a plain English one liner that fits on a screen without scrolling and gives you enough to carry on reading whatever article sent you here. The next section is context — where the term came from, why it exists, what it is actually used for in the wild. The final section is cross references to related entries so you can keep pulling on threads.

We try hard to be honest about uncertainty. Crypto has a lot of terms where the “correct” definition is contested or has drifted over time. When that is the case we say so rather than picking one version and presenting it as gospel. We also try to call out when a term is more marketing than substance, or when it has lost its original meaning and is now used loosely.

The length of an entry is proportional to how much there is to say, not to how important the term feels. “Hash function” is a long entry because explaining what a hash function actually does takes more than two sentences. “WAGMI” is a short entry because it really is just one acronym and a bit of culture. Neither is more important than the other — they are both things you will run into and need to understand.

When You Need More Than a Glossary

A glossary is a starting point, not a research tool. If you are trying to decide whether to buy a coin, or how to structure a portfolio, or whether a new DeFi protocol is safe to use, reading a one page definition of the core concepts is the first step, not the last. From here we recommend the guides section for longer form explanations of how things actually work, the coin pages for project specific context, and the news section for current developments.

The glossary exists to get you to the point where you can read those other resources without getting lost in unfamiliar vocabulary. Use it that way and it will earn its place in your browser bookmarks.