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

• fantastic
• fantastical
• inconceivable
• incredible
• incredulous
• unbelievable
• uncompelling
• unconceivable
• unconvincing
• unimaginable
• 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

The movie is so unsure what to do with her that her two big moments are an implausible brawl and her delight at finding a comfortable office chair. —Amy Nicholson, Los Angeles Times, 24 Apr. 2025

In this moment, master and apprentice finally talk as equals, their long-standing friendship much more believable than the implausible romance that's allegedly the root of the Republic's demise. —Richard Edwards, Space.com, 24 Apr. 2025

This all sounded implausible: like much of Frank’s regaling, the story felt conjured from an Eighties spy thriller. —Maddy Crowell, Harpers Magazine, 28 Mar. 2025

But in radically transforming attitudes both within the club and towards the club over the last two years, PSG have already pulled off an implausible win. —Tom Williams, New York Times, 8 Apr. 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