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English definition of “one-off”

one-off

noun [S] uk   /ˌwʌnˈɒf/ us    /-ˈɑːf/ UK
something that happens or is made or done only once: Will you be doing more talks in the future or was that just a one-off?Rarely and infrequently

one-off

adjective uk   /ˌwʌnˈɒf/ us    /-ˈɑːf/ UK (US one-shot)
happening only once: They gave him a one-off payment to compensate for the extra hours that he had to work.Rarely and infrequently
(Definition of one-off from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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