Crypto Glossary
Ethereum
A blockchain that lets developers build apps and issue tokens. Often called a programmable money platform.
Definition
Ethereum is a blockchain network that does more than just send a single currency. It lets developers run small programs called smart contracts, which power things like stablecoins, lending apps, NFTs, and games.
The network's own coin is called Ether (ETH). You pay a small amount of ETH every time you use the network, which is called a gas fee.
Related terms
- Smart ContractA program that runs on a blockchain and does what it says, automatically.
- GasThe unit a blockchain uses to measure how much work a transaction takes.
- TokenA unit of value created on top of an existing blockchain like Ethereum.
- Layer 2A faster, cheaper network built on top of a layer 1 like Ethereum. Borrows the main chain's security.
Source: What The Block! Dictionary v1.0 (last updated 2026-04-25).