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Originally "meet, meet in argument", from Middle French occurrer, from Latin occurrō (run to meet, run against, befall, present itself) from prefix ob- (against) + verb currō (run, hurry, move).



occur (third-person singular simple present occurs, present participle occurring, simple past and past participle occurred)

  1. To happen or take place.
    The liftoff will occur in exactly twelve seconds.
  2. To present or offer itself.
    I will write if the opportunity occurs.
  3. (impersonal) To come or be presented to the mind; to suggest itself.
    • 1995, Theodore Kaczynski, Industrial Society and Its Future,
      Apparently it never occurs to them that you can't make rapid, drastic changes in the technology and the economy of a society without causing rapid changes in all other aspects of the society as well, [...]
  4. (sciences) To be present or found.
    The chemical monofluoroacetate occurs in all parts of Dichapetalum cymosum, and is responsible for its toxic effects.


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