1
as in authoritative
being the most accurate and apparently thorough the definitive work on the attack on Pearl Harbor

Synonyms & Similar Words

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Synonym Chooser

How is the word definitive different from other adjectives like it?

Some common synonyms of definitive are conclusive, decisive, and determinative. While all these words mean "bringing to an end," definitive applies to what is put forth as final and permanent.

the definitive biography

When is it sensible to use conclusive instead of definitive?

In some situations, the words conclusive and definitive are roughly equivalent. However, conclusive applies to reasoning or logical proof that puts an end to debate or questioning.

conclusive evidence

When is decisive a more appropriate choice than definitive?

The synonyms decisive and definitive are sometimes interchangeable, but decisive may apply to something that ends a controversy, a contest, or any uncertainty.

a decisive battle

When can determinative be used instead of definitive?

The meanings of determinative and definitive largely overlap; however, determinative adds an implication of giving a fixed character or direction.

the determinative factor in the court's decision

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of definitive Finally, after more than a month of agony, her allergist diagnosed her with chronic spontaneous urticaria (CSU) — an incurable condition marked by hives that last six weeks or longer, with no definitive cause or trigger. Diane Herbst, People.com, 11 July 2025 No single museum offered a definitive narrative of the junta, the desaparecidos, and the quest for justice. Julia M. Klein, The Atlantic, 11 July 2025 To be fair, Jaws @ 50: The Definitive Inside Story is, well, the definitive inside story. Tony Maglio, HollywoodReporter, 4 July 2025 For many, Shirow is one of the definitive modern manga creators and is also hugely influential. Ollie Barder, Forbes.com, 4 July 2025 See All Example Sentences for definitive
Recent Examples of Synonyms for definitive
Adjective
  • The authoritative record of NPR’s programming is the audio record.
    Steve Inskeep, NPR, 14 July 2025
  • There’s an authoritative front grille and bumper, and revised rear tail lights.
    Josh Max, Forbes.com, 11 July 2025
Adjective
  • The forensic evidence was so conclusive that the case settled for a fraction of the initial demand, saving millions in potential damages.
    Lars Daniel, Forbes.com, 14 July 2025
  • So Professor Thackeray, being a smart and thorough scientist, decided to obtain conclusive proof.
    Sam Kelly July 8, Literary Hub, 8 July 2025
Adjective
  • Be The Boss: Give Your AI A Role And Super-Clear Instructions The most effective AI startups treat their LLMs like new, highly capable team members needing explicit direction.
    Pradeep Kumar Muthukamatchi, Forbes.com, 15 July 2025
  • And on Sunday a hacker used Elmo's X account to post explicit remarks on social media against President Donald Trump.
    Frank Witsil, Freep.com, 14 July 2025
Adjective
  • The beverages are plentiful and inexpensive, and the food is standard but fun, classic American fare.
    Mackensy Lunsford, The Tennessean, 26 July 2025
  • The West Hollywood 24/7 drive-in has 80 Tesla charging stations and serves classic American diner food — biscuits and gravy, burgers, fries, tuna melts and milkshakes, to name a few of its menu items.
    Karoline Leonard, Austin American Statesman, 26 July 2025
Adjective
  • Curiously, the two players who were decisive in last night’s tie, Coll and Bonmati, were the two major issues for Spain in the run-up to and during these Euros.
    Laia Cervelló Herrero, New York Times, 24 July 2025
  • The decisive feature that demonstrates the fossil was likely an early arachnid is the unique organization of the brain -- a reverse of the front-to-back arrangement found in present-day crustaceans, insects, centipedes and horseshoe crabs, the researchers said.
    Julia Jacobo, ABC News, 23 July 2025
Adjective
  • The city offers little in the way of culinary variety — a definite downside for food lovers seeking new and exciting options, according to the study.
    Brandi D. Addison, Austin American Statesman, 22 July 2025
  • This in itself makes a refreshing change from the usual baffling Marvel McGuffin, and even though the outcome is wholly predictable, there’s a definite frisson in the sight of The Herald’s liquid-metal hand trying to snatch Sue’s baby from the womb.
    Damon Wise, Deadline, 22 July 2025
Adjective
  • Several cities in Broward already have exemplary public education and recycling programs underway.
    Linda Thompson Gonzalez, Sun Sentinel, 20 July 2025
  • This is a guy who has been a team captain for a long time, exemplary character, all of that.
    Justin Grasso, MSNBC Newsweek, 18 July 2025
Adjective
  • But his bet is clear: That in a fractured media world, personality, tone, and trust matter more than legacy or even scale.
    Andy Meek, Forbes.com, 23 July 2025
  • Now it's become clear that electric vehicles won’t take over as quickly as expected.
    Stuart Dyos, The Tennessean, 23 July 2025

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Cite this Entry

“Definitive.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/definitive. Accessed 30 Jul. 2025.

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