die out (third-person singular simple present dies out, present participle dying out, simple past and past participle died out)
- (idiomatic) To become extinct.
1963, Margery Allingham, chapter 1, in The China Governess:
- The original family who had begun to build a palace to rival Nonesuch had died out before they had put up little more than the gateway, […].
- (idiomatic) To cease gradually.
- The prejudice has died out.