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operative

/ˈɒpəɹətɪv/ noun

Latin root: operātīvus Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about operative at Wordnik → Where our words come from →

  1. A person secretly employed in espionage for a government.
  2. Someone who can be employed as a detective to collect information.

adjective

  1. Being in force or having or exerting force.
    operative regulations
  2. Relating to or requiring or amenable to treatment by surgery especially as opposed to medicine.
    a surgical appendix
  3. Effective; producing a desired effect.
    the operative word

Origin

From Middle English operative, operatyfe, from Middle French operatif (modern French opératif) or its etymon Latin operātīvus. By surface analysis, operate + -ive.

From Wiktionary, via Kaikki.org (CC BY-SA)