implausible

adjective

im·​plau·​si·​ble (ˌ)im-ˈplȯ-zə-bəl 

: not plausible : provoking disbelief

implausibility

(ˌ)im-ˌplȯ-zə-ˈbi-lə-tē 

noun

implausibly

(ˌ)im-ˈplȯ-zə-blē 

adverb

Synonyms

• incredible
• incredulous
• unlikely
• impossible
• fantastical
• unconvincing
• inconceivable
• unbelievable
• absurd
• ridiculous
• doubtful
• unreasonable
• unthinkable

Examples of implausible in a Sentence

She's been making implausible claims.

He gave an implausible excuse for showing up late for work.

The novel has an implausible ending.

Recent Examples on the Web

That doesn’t feel remotely implausible, given the level of talent (and of the popular appreciation for that talent) at play here. —Chris Willman, Variety, 4 Aug. 2025

Amazon’s surprise entry into grocery retail with the 2017 acquisition of Whole Foods, for example, must’ve seemed implausible to incumbent retailers at the time and likely wasn’t considered as a scenario to anticipate. —François Candelon, Fortune, 11 July 2025

There's also a nod to the narrator's wife making an unexpected comeback late on, though Robbie's miraculous/implausible (delete as appropriate) return from the dead stretches credibility way past breaking point. —Richard Edwards, Space.com, 29 June 2025

Unfortunately, the romance is not only forbidden, but personal secrets make their connection even more implausible. —Aramide Tinubu, Variety, 23 July 2025

Word History

First Known Use

circa 1677, in the meaning defined above

Rhymes for implausible

• plausible

Kids Definition

implausible

adjective

im·​plau·​si·​ble (ˈ)im-ˈplȯ-zə-bəl 

: causing disbelief : not plausible

implausibility

(ˌ)im-ˌplȯ-zə-ˈbil-ət-ē 

noun

implausibly

(ˈ)im-ˈplȯ-zə-blē 

adverb