a done deal

a done deal

a final decision or agreement We've already hired someone for the position, so this is a done deal.
Usage notes: often used in the forms it's a done deal or it's not a done deal: We told them we needed more time to think about it, so it's not a done deal.
Etymology: based on the literal meaning of done (finished)
See also: deal, done

a done deal

  (mainly American)
a final decision or agreement (often negative) It's not a done deal - we're still talking about who to hire for the job.
See also: deal, done