Bygone
Bygone adjective - No longer existing.
Heretofore and bygone are semantically related. In some cases you can use "Heretofore" instead an adverb "Bygone".
Heretofore
Heretofore adverb - Up to this or that time.
Bygone and heretofore are semantically related. Sometimes you can use "Bygone" instead an adverb "Heretofore".
Mutual synonyms
Cite this Source
Heretofore and Bygone. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/bygone/heretofore
Bygone & Heretofore. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/bygone/heretofore>.
Heretofore or Bygone. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/bygone/heretofore.
Google Ngram Viewer shows how "bygone" and "heretofore" have occurred on timeline