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

Though the oracle also claims to boast connections to Pythagoras and Alexander the Great, Beard deems this implausible. —Elizabeth Djinis, Smithsonian Magazine, 31 Oct. 2024

But right now, both the fact and the details of it feel unearned and implausible. —Sara Holdren, Vulture, 25 Sep. 2024

More and more, Americans seem ready to believe anything consistent with their outlook and biases, no matter how implausible or outrageous. —Peter Suciu, Forbes, 9 Oct. 2024

But if Jon Snow were to show up wearing a jetpack and blasting fools with a plasma rifle, that would be implausible—even within a fantasy setting (or perhaps especially within that setting). —Erik Kain, Forbes, 7 Oct. 2024

Word History

First Known Use

circa 1677, in the meaning defined above

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