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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.

Even so, researchers have not reached a definitive conclusion.

From Science Daily • Mar. 30, 2026

"And by having a definitive start and finish at the beaches, it feels very complete."

From BBC • Mar. 25, 2026

It is too early to offer a definitive assessment of the landscape of antisemitism in the post-Oct.

From Los Angeles Times • Mar. 24, 2026

What’s Next: Gene Sloan, cruise director for The Points Guy, said investors will get their first definitive read on what impact the war is having, or not having, when Carnival reports first-quarter earnings on Friday.

From Barron's • Mar. 24, 2026

Although Frederick Griffith’s experiment was the most definitive demonstration that the gene was a chemical, other scientists were also circling the idea.

From "The Gene" by Siddhartha Mukherjee

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