Bygone
Bygone adjective - No longer existing.
Outdated
Outdated adjective - Having passed its time of use or usefulness.
Usage example: an outdated rotary telephone
Bygone is a synonym for outdated in old-fashioned topic. You can use "Bygone" instead an adjective "Outdated", if it concerns topics such as new.
Mutual synonyms
Cite this Source
Outdated and Bygone. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/bygone/outdated
Bygone & Outdated. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/bygone/outdated>.
Outdated or Bygone. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/bygone/outdated.
Google Ngram Viewer shows how "bygone" and "outdated" have occurred on timeline