Definition of "definitive" in English

adjective

1. explicitly defined

2. determining finally, conclusive, decisive

   • definitive vote
   • She will have the definitive say in the matter, after consulting her board of directors.

3. definite, authoritative and complete

4. limiting; determining

   • a definitive word

5. (philately) general, not issued for commemorative purposes

6. (obsolete) Determined; resolved.

noun

1. (grammar) a word, such as a definite article or demonstrative pronoun, that defines or limits something

2. (philately) an ordinary postage stamp that is part of a series of all denominations or is reprinted as needed to meet demand