Erstwhile — synonyms, definition

1. erstwhile (o) archaic

already before earlier formerly heretofore long ago once previously sooner

2. erstwhile (a) archaic

already before bygone former formerly heretofore late old once one-time past previously sooner

3. erstwhile (Adjective) archaic

onetime quondam sometime

erstwhile (Adjective) — Belonging to some prior time. ex. "erstwhile friend"

4. erstwhile (Adverb) archaic

at one time erst

erstwhile (Adverb) — At a previous time. ex. "her erstwhile writing"