On cryptocurrency blockchain networks a transaction is described as being “final” when it becomes permanent and irreversible. Transaction finality occurs once the block that contains the transaction is mined or validated. Unlike traditional centralized systems, blockchain transactions are immutable and cannot be reversed or undone. Every blockchain is built with different parameters and the time it takes for finality to occur will differ across all chains.
NFT Term
Finality
Definition of Finality from the NFTguild.com glossary.

