50 entries under idiom topic. ×
| no more(expression, adjective, split, lifeless) | |
| out of date(expression, adjective) | |
| no longer existing | |
| at rest(expression, adjective, live) | |
| behind the times(expression, odd, old, primitive) | |
| out of style(expression, odd, old, primitive) | |
| down the drain(expression, split, lacking, finished) | |
| dead and buried | |
| dead and gone(expression, adjective, dead, death) | |
| dead as nits(expression, death) | |
| down memory lane(expression, adjective, dead, past) | |
| lost to sight | |
| lost to view | |
| not a sign of(expression, split, away, lacking) | |
| not with it(expression, odd, old, primitive) | |
| of olden days(expression, odd, old, primitive) | |
| of the old school(expression, odd, old, primitive) | |
| out of it(expression, odd, old, primitive) | |
| out of sight | |
| out of use |
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| APA | Smart Define. (2016). extinct thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/extinct/thesaurus/synonyms |
| Chicago | Smart Define. 2016. "extinct thesaurus" https://smartdefine.org/extinct/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2016, extinct thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/extinct/thesaurus/synonyms>. |
| MLA | Smart Define. "extinct thesaurus" 10 February 2016. Web. 20 September 2026. <https://smartdefine.org/extinct/thesaurus/synonyms> |