Once — synonyms, definition

1. once (o)

already before earlier erstwhile formerly heretofore long ago one time previously sooner

2. once (a)

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

3. once (Adverb)

at one time erst in one case sometime when

once (Adverb) — On one occasion. ex. "once I ran into her"

once (Adverb) — As soon as. ex. "once we are home, we can rest"

once (Adverb) — At a previous time. ex. "she was a dancer once"