- as soon as; when
- We didn't know how we would cope once the money had gone.
- The water is fine once you're in!
Word OriginMiddle English ones, genitive of one. The spelling change in the 16th cent. was in order to retain the unvoiced sound of the final consonant.Definitions on the go
Look up any word in the dictionary offline, anytime, anywhere with the Oxford Advanced Learner’s Dictionary app.
Check pronunciation:
once