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Definitions

implausible

[im-plaw-zuh-buhl] / ɪmˈplɔ zə bəl /
ADJECTIVE
not likely
Synonyms
STRONGEST
dubious farfetched flimsy impossible improbable inconceivable incredible unbelievable unconvincing unreasonable
WEAK
doubtful far-out fishy for the birds full of holes obscure problematic puzzling reachy suspect thin too much unsubstantial weak won't hold water won't wash
Antonyms
STRONGEST
believable convincing credible likely plausible possible realistic reasonable tenable

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.

Air Force and combat planner, said the explanation seemed implausible because of the rigorous methodology by which planners review targets.

From The Wall Street Journal • Mar. 6, 2026

Aswath Damodaran, the so-called ‘dean of valuation,’ said a popular characterization of a dystopian AI future of displacement and disruption was implausible.

From MarketWatch • Mar. 5, 2026

He said while Tina Smith was "in the thrall of McKenna" it was implausible that she did not know what was happening in McKenna's operations.

From BBC • Feb. 12, 2026

But those implausible sci-fi scenarios, believe it or not, are nowhere near the worst-case possibilities.

From Salon • Jan. 18, 2026

One might think that Schaffer or his readers would have rejected these arguments as inherently implausible.

From "The Invention of Science" by David Wootton

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