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English definition of “definitive”

definitive

adjective     /dɪˈfɪn.ɪ.tɪv/ US  /-ə.t̬ɪv/
C2 not able to be changed or improved : a definitive judgment / ruling There are no definitive answers / solutions to this problem . The police have no definitive proof of her guilt .CertaintyConfidence and self-assurance considered to be the best of its type : He's written the definitive guide to Thailand.CertaintyConfidence and self-assurance definitively     /-li/ adverb CertaintyConfidence and self-assurance
(Definition of definitive adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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