From Longman Dictionary of Contemporary Englishdefinitivede‧fin‧i‧tive /dɪˈfɪnətɪv/ ●○○ AWL adjective 1 [usually before noun]BEST a definitive book, description etc is considered to be the best and cannot be improveddefinitive study/work/guide etc the definitive study of Victorian railway stations2 CHANGE/MAKE something DIFFERENTa definitive agreement, statement etc is one that will not be changed a definitive agreement to buy the company —definitively adverb
Examples from the Corpus
definitive• None can provide a definitive answer to the question of whom resources should be spent on.• She has written the definitive book on the poet Wordsworth.• This may be the definitive book on the Scarlatti trial.• However, definitive decisions about such measures must rest with medically qualified personnel.• However, the design can be a useful, if not a definitive, indicator of a rug's origins.• Many people regard it as the definitive interpretation of 'War and Peace'.• Suppose, for sake of argument, that this is indeed the definitive legal position.• The definitive movie on these two men whose courage reshaped a nation remains to be made.• He added that many market watchers had been hoping for some type of agreement or definitive news yesterday.• A definitive set of grammatical tags does not exist.• Griffin is the author of the definitive travel guide 'France at Your Fingertips'.• His books may not be the most definitive works on the phenomenon they describe.definitive study/work/guide etc• Because it will be my definitive work.• The Black Book Of Communism is not a definitive work.• A later and quite definitive study conducted by Miller between 1973 and 1978 bore this out.• This is not the definitive work of television.• This became the definitive work of the period.• His books may not be the most definitive works on the phenomenon they describe.• Halliwell's Film Guide the definitive guide to the movies. 4. 