op·era·tiveBrE/ˈɒpərətɪv/NAmE/ˈɑːpərətɪv/, /ˈɑːpəreɪtɪv/adjective[not usually before noun]readytobeused; inuse可使用;在使用中SYNfunctional◆Thislawbecomesoperativeimmediately. 本法规即时生效。◆ThestationwillbefullyoperativeagaininJanuary. 该站将于一月份全部恢复运营。[only before noun](medical医学) connectedwithamedicaloperation手术的◆operativetreatment手术治疗➡ see alsopost-operative●theoperativewordusedtoemphasizethataparticularwordorphraseisthemostimportantoneinasentence关键词;最重要的词语◆Iwasinlovewithher—'was'beingtheoperativeword. 在 I was in love with her 这句话中,was 是关键词。