'operative' definitions:

Definition of 'operative'

From: WordNet
adjective
Being in force or having or exerting force; "operative regulations"; "the major tendencies operative in the American political system" [ant: inoperative]
adjective
Relating to or requiring or amenable to treatment by surgery especially as opposed to medicine; "a surgical appendix"; "a surgical procedure"; "operative dentistry" [syn: surgical, operative] [ant: medical]
adjective
Effective; producing a desired effect; "the operative word"
adjective
(of e.g. a machine) performing or capable of performing; "in running (or working) order"; "a functional set of brakes" [syn: running(a), operative, functional, working(a)]
noun
A person secretly employed in espionage for a government [syn: secret agent, intelligence officer, intelligence agent, operative]
noun
Someone who can be employed as a detective to collect information [syn: private detective, PI, private eye, private investigator, operative, shamus, sherlock]

Synonyms of 'operative'

From: Moby Thesaurus

Words containing 'operative'