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Definition of “once” - English Dictionary

"once" in American English

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onceadverb [not gradable]

us   /wʌns/
on or at a single time: I went to Disney World once. The book club meets once a month. Going to the Olympics is a once-in-a-lifetime opportunity (= a rare and valuable one).
in the past, but not now: I lived in Milwaukee once. Computers are much cheaper now than they once were.

onceconjunction

us   /wʌns/
  • once conjunction (AS SOON AS)

as soon as, or when: Once you’ve tried their ice cream, you’ll be back for more.
(Definition of once from the Cambridge Academic Content Dictionary © Cambridge University Press)







"once" in British English

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onceadverb

uk   /wʌns/ us   /wʌns/
  • once adverb (ONE TIME)

A2 one single time: I went sailing once, but I didn't like it. We have lunch together once a month.
at once
C1 at the same time: They all started talking at once.
for once
B2 used when something happens that does not usually happen: For once, the bus came on time.
just this once
used to say that you will only do or request something on this particular occasion: All right, I'll lend you the money - just this once.
once again also once more
B1 again, as has happened before: Once again, racist attacks are increasing across Europe.
once more
B1 one more time: I'd like to visit the campus once more before we leave.
again, as has happened before: When my father came home, everything felt right once more.
once or twice
a few times: I've seen him once or twice in town.
(every) once in a while
B2 sometimes but not often: We meet for lunch once in a while.
once and for all
C2 completely and in a way that will finally solve a problem: Our intention is to destroy their offensive capability once and for all.
once in a lifetime
only likely to happen once in a person's life: An opportunity as good as this arises once in a lifetime.
the once
UK on a single occasion: I've only played rugby the once, and I never want to play it again.

expend iconexpend iconMore examples

onceconjunction

uk   /wʌns/ us   /wʌns/
(Definition of once from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Avoiding common errors with the word enough.
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