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Definitions

definitive

[dih-fin-i-tiv] / dɪˈfɪn ɪ tɪv /
ADJECTIVE
authoritative
Synonyms
STRONGEST
actual categorical clear-cut conclusive decisive definite exhaustive precise reliable specific ultimate unambiguous
WEAK
absolute closing complete completing concluding determining downright ending express final finishing flat out last limiting nailed down perfect plain real settling straight out terminal terminating
Antonyms
STRONGEST
ambiguous false imprecise indefinite inexact questionable uncertain vague
WEAK
incomplete inconclusive interim temporary unreliable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Defense Secretary Pete Hegseth declined to offer a definitive timeline for the conflict or rule out a ground invasion in a news conference Tuesday morning, though he said negotiations are ongoing.

From Barron's • Mar. 31, 2026

Even so, researchers have not reached a definitive conclusion.

From Science Daily • Mar. 30, 2026

It is unhygienic, but there is no definitive proof it is responsible and is hardly unusual behaviour.

From BBC • Mar. 20, 2026

The allegations against Cesar Chavez represent a definitive puncturing of the myth surrounding the civil rights icon and necessitate a comprehensive reckoning with how Latino communities elevated him despite warning signs of moral failings.

From Los Angeles Times • Mar. 18, 2026

Thus knowledge, in so far as we have it, is not absolute but progressive, not definitive but provisional.

From "The Invention of Science" by David Wootton

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.