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once - definition and synonyms


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adverb, conjunction, noun     once pronunciation in American English
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Once can be used in the following ways:
as an adverb: I only met him once.They’ve been here once before.
as a conjunction: Once you get there, you’ll love it.
as a noun (after “for” or “at”): For once I wish you’d tell me the truth. (after “the,” “this,” or “that”): Yes, I met him, but just the once.
  1. 1
    on one occasion only

    Cathy’s only been to visit us once.

    I’d seen the show once before, but I enjoyed seeing it again.

    I’m only going to say this once, so listen carefully.

    (just) the once (=on one particular occasion only):

    We met just the once, but I still remember him very clearly.

  2. 2
    used for saying that a particular situation existed at a time in the past, but it does not exist any longer

    Did you know that Dan was once a policeman?

    Louise bought the house where her grandparents had once lived.

    The once mighty U.S. car industry was now facing strong competition from abroad.

    1. a.
      used for saying that something happened at some time in the past

      Once we drove all the way to Knoxville with four little kids in the back seat.

      I once taught myself to knit, and I was pretty good at it.

  3. 3
    used for saying that as soon as one thing happens, something else happens

    Once we were through the gates, we still had to find our seats.

    I’m sure you’ll be very happy here once you get to know everyone.



the situation of the United Kingdom leaving the European Union

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a rise in the level of a stream or river

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