- Definitions|0
- Thesaurus|96
- Abbreviations|0
| superannuated(adjective, odd, old, primitive, unfashionable) | |
| antediluvian(old, unfashionable, obsolete, antiquated, archaic) | |
| back-number(adjective, current) | |
| bourgeois(adjective, conventional, old-fashioned, dated) | |
| button-down(adjective, conventional, old-fashioned) | |
| conventional(adjective, old-fashioned) | |
| defunct(outmoded, out-of-date) | |
| fossil | |
| frumpy(outmoded, out-of-date) | |
| fusty | |
| inadmissible | |
| inelegant(outmoded, out-of-date) | |
| old-fogeyish | |
| old-fogyish | |
| orthodox(adjective, conventional, old-fashioned) | |
| outdate | |
| overage | |
| past it | |
| strait-laced(adjective, conventional, old-fashioned) | |
| stuffy(adjective, conventional, old-fashioned) |
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| APA | Smart Define. (2015). behind the times thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/behind_the_times/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "behind the times thesaurus" https://smartdefine.org/behind_the_times/thesaurus/synonyms (accessed September 30, 2026). |
| Harvard | Smart Define 2015, behind the times thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/behind_the_times/thesaurus/synonyms>. |
| MLA | Smart Define. "behind the times thesaurus" 13 April 2015. Web. 30 September 2026. <https://smartdefine.org/behind_the_times/thesaurus/synonyms> |