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Definition of definitive

definitive

/dɪˈfɪn.ə.tɪv/
de · fin · i · tive

Adverb:definitively
•
Plural:definitives
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definitive Lexical Profile

definitive Game Scores & Validity

• adjective

1

Reached or done decisively and with authority; conclusive and unconditional.

Example

"The medical research team is still waiting for a definitive answer regarding the effectiveness of the new treatment."


2

Most reliable, complete, and authoritative of its kind (especially of a written work, edition, or performance).

Example

"Her two-volume book is widely considered the definitive biography of the nineteenth-century composer."


3

Fully developed or mature; fixed in its final physical form (in biology and anatomy).

Example

"During metamorphosis, the larva undergoes complex cellular reorganization to reach its definitive adult structure."

Synonyms
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Antonyms
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• noun

1

A postage stamp forming part of the regular, permanent issue of a country for everyday postal needs, as opposed to a temporary commemorative stamp.

Example

"The philatelist organized an album dedicated entirely to nineteenth-century British definitives."

Word Nuance & Usage

Do not confuse 'definitive' with 'definite': 'definite' means certain, clear, or exact (e.g., 'a definite plan'), whereas 'definitive' means final, unconditional, or serving as the most authoritative example of its kind (e.g., 'the definitive biography').

• Rhymes for definitive

Word Origin & Etymology

Borrowed from Old French 'definitif' and Late Latin 'definitivus', from Latin 'definitus', the past participle of 'definire' ('to limit, bound, or explain'), derived from 'de-' ('completely') and 'finire' ('to bound or limit', from 'finis', meaning 'end' or 'boundary').

Cite this Entry


Wordmom. (2026). Definition of Definitive. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/definitive
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