| irrecoverable | |
| kaput | |
| lapsed | |
| lost(adjective, dead, past, previous, former) | |
| low-tech | |
| mediaeval | |
| metachronistic | |
| metronomic | |
| misdated | |
| mistimed | |
| mossy | |
| neglected(adjective, odd, old, primitive, unfashionable) | |
| new | |
| no more | |
| not current(expression, odd, square, old, primitive) | |
| not modern(expression, odd, old, primitive, unfashionable) | |
| not with it(expression, idiom, odd, out, old) | |
| odd(adjective, old, primitive, unfashionable, outdated) | |
| of olden days(expression, idiom, odd, old, primitive) | |
| of the old school(expression, idiom, odd, square, old) |
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| APA | Smart Define. (2015). dated thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/dated/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "dated thesaurus" https://smartdefine.org/dated/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, dated thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/dated/thesaurus/synonyms>. |
| MLA | Smart Define. "dated thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/dated/thesaurus/synonyms> |