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.

The defendant has contended he did not realise that he had run over anyone -- a claim that another prosecutor, Marco Reinl, called utterly implausible.

From Barron's • Jun. 4, 2026

Fundamentally most conspiracy theories are highly implausible and just don’t make sense.

From The Wall Street Journal • May 24, 2026

The broader biographical facts are obeyed, but “Amadeus” is fundamentally ahistorical, and sometimes implausible: It is to be trusted only as television.

From Los Angeles Times • May 8, 2026

The “deal of valuation,” Aswath Damodaran says Citrini’s viral AI doomsday scenario is implausible.

From MarketWatch • Mar. 5, 2026

The very idea of a color broadcast was so implausible that Alvarez secreted a small magnet in his pocket to verify that the picture was actually produced by electrons striking a phosphor screen.

From "Big Science" by Michael Hiltzik

Vocabulary lists containing implausible

Grade 9, List 6

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The Namesake

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Summer of the Mariposas

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