operative C2+ Topic:Cause, Change & Process US /ˈɑpərətɪv/ UK /ˈɒpərətɪv/ See IPA manual Meanings 1 adj functioning or having effect; in operation The new regulation becomes operative at midnight. Thesaurus Synonyms 1 adj · functioning or having... functioningeffectiveactiveworkingoperationalin forcevalid ↔ Opposites inoperativeineffectiveinvaliddefunctdormant Word family Derived forms operativelyoperativeness Related forms operateoperationoperantcooperative Etymology AI details From Late Latin 'operativus' ('creative, formative'), from Latin 'operari' ('to work'), from 'opus' ('work'). operativus Latin operari Latin View etymology graph -> Topics Cause, Change & Process Word Formation & Derivatives External links Cambridge Dictionary Wiktionary Google Images # operative **Type:** Word **Level:** C2+ **Part of speech:** adj **IPA (US):** /ˈɑpərətɪv/ **IPA (UK):** /ˈɒpərətɪv/ ## Meanings 1. functioning or having effect; in operation ## Examples - The new regulation becomes operative at midnight. ## Synonyms - functioning - effective - active - working - operational - in force - valid ## Antonyms - inoperative - ineffective - invalid - defunct - dormant ## Derived Forms - operatively - operativeness ## Related Forms - operate - operation - operant - cooperative ## Roots and Affixes - Root: operativus - Root: operari ## Etymology From Late Latin 'operativus' ('creative, formative'), from Latin 'operari' ('to work'), from 'opus' ('work'). ## AI Etymology Operative is from Late Latin 'operativus' ('creative, formative'), from Latin 'operari' ('to work'), from 'opus' ('work'). Important recorded forms include operativus (Latin) and operari (Latin). The current sense covers functioning or having effect; in operation. The wider family includes derived forms such as operatively and operativeness and related words such as operate, operation, operant, and cooperative. ## Topics - Cause, Change & Process - Word Formation & Derivatives markdown