(确定不移的形势) foregone conclusion; inevitable outcome
The outcome of this football game is a foregone conclusion.
这场足球赛, 谁胜谁负已成定局。
The die is cast.
已成定局, 无可挽回。
(做最后决定) settle finally; make a final decision
The matter hasn't come to a decision yet.
事情还没定局。