a done deal
This page is about the idiom a done dealINFORMAL
A done deal is an agreement or a decision that is final.
- It's a done deal so we can go ahead and start planning the details.
- No-one knew about it, but the contract has been a done deal since the senator spoke to the minister last month.
This idiom is typically used in American English but may be used in other varieties of English too.
Linda's appointment as head of marketing is a done deal. She
Contributor: Matt Errey