The great thing is that we've made a definite decision."Can not you give us something more definite to go upon?'It had no definite organization, officers or abode.
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Definitive
/dɪˈfɪnətɪv/
Considered to be the most complete and authoritative example in its category
Examples:
The study provides definitive proof of the theory.Her decision was definitive and unchanging.He issued a definitive statement on the matter.
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Ways to tell them apart:
Definite is related to certainty and being clear with no doubt, whereas definitive suggests something that is ultimate or considered the most complete.
Think of definite as being about something being sure or certain, like a definite answer to a question or a definite plan.
Meanwhile, definitive is like the last word on a subject — think of a definitive guide or a definitive edition of a book.
Use definite when you want to express clarity and certainty.
Use definitive when you want to express something as the best or most authoritative.