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definitive

adjective
 
 
/dɪˈfɪn.ɪ.tɪv/ US  /-ə.t̬ɪv/

Definition

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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