English Lexicon

One-off event

/ˌwʌn.ɒf ɪˈvent/
nounCEFR B2 (Upper)Top #8500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    An occurrence, happening, or activity that is planned or happens only once and is not part of a regular series.

    "The music festival was organized as a special one-off event to celebrate the city's centenary."
  2. 2

    An isolated incident that is unlikely to be repeated in the future.

    "The management assured employees that the budget cuts were a one-off event and will not affect next year."

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Linguistic Origin & Historical Etymology

Derived from the idiomatic phrase 'one-off' (originating in British English during the mid-19th century to denote something happening only once, likely from 'one off the batch') combined with 'event', stemming from Latin 'evenire' meaning 'to come out or happen'. Over time, the combined compound has solidified in administrative, commercial, and everyday lexicon to describe singular, non-recurring occurrences.

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