Glossary
Short definitions you can actually use. Written for this site (not copied).
Address
A public identifier where crypto is received/sent on a blockchain.
Approval
Permission you grant a contract to spend a token on your behalf. Approve only trusted apps.
Block
A batch of validated transactions added to the blockchain in order.
Bridge
A tool/process that moves assets from one chain to another.
Confirmation
Additional blocks after your transaction that increase confidence it won’t be reversed.
Gas fee
The network cost to execute a transaction. Usually paid in the chain’s native token.
Nonce
A counter that keeps your transactions in order and prevents replay.
Rollup
A scaling method that batches many transactions and settles results to Ethereum.
Seed phrase
A set of words that can recreate your wallet keys. Treat it like the master password—never share.
Transaction hash
A unique ID used to track a transaction in a block explorer.