1. To be dead, destroyed, or in deep trouble after something negative happens. Almost always used in a figurative sense. I just got bad news from the auto repair shop—my car is history. You'll be history once the principal finds out you plagiarized that paper.
2. To be a thing of the past; to be no longer relevant. A: "I thought that you didn't get along with Jenny." B: "Oh, that's history! We're friends now." Can you please clean out all this junk? Cassette tapes are history, and there's no reason to keep them!
COMMON If someone or something is history, they are no longer important or no longer exist. If you forget to do your homework, you're history. He raises a hammer and swings it at the stone. A dozen well aimed blows, and the thing is history.
be history1 be perceived as no longer relevant to the present. 2 used to indicate imminent departure, dismissal, or death. informal
2 1995 Country If Ducas does get the girl, you can lay odds that she'll be history by the end of the song.