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.

That is formidable, but this book is meant to be definitive, and it succeeds in accomplishing that.

From Salon • Apr. 14, 2026

However, the data is limited and not definitive.

From Science Daily • Apr. 12, 2026

The independent directors have retained law firm Munger, Tolles & Olson LLP, which has brought on AlixPartners as an independent consultant, and there is no definitive timetable for the investigation.

From Barron's • Apr. 8, 2026

Some are staying on the sidelines, waiting for a concrete development or a definitive end to the war before committing to a major trade.

From The Wall Street Journal • Apr. 7, 2026

This was important in the long term, because in the nineteenth century it would provide a definitive test of whether light does travel as a wave or whether it travels as a stream of particles.

From "The Scientists" by John Gribbin

Vocabulary lists containing definitive

New Shakespeare Lines Discovered?

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

G.1: Principles of Geography (Sources 1–14)

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Extremely Loud and Incredibly Close

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!