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

This didn’t, and still doesn’t, seem all that implausible to me. —Ellen Cushing, The Atlantic, 22 Sep. 2025

And then, 11 days later, the movie will appear in theaters nationwide, something that seemed implausible over the years as the rejections kept piling up. —Tim Casey, Forbes.com, 8 Sep. 2025

There will be another plague of bunnies on trampolines that send apps into a panic, or a video of a political figure that convinces people on the fringes of something completely implausible. —Ct Jones, Rolling Stone, 30 Aug. 2025

But witnessing that scene Sunday night, even the most casual fan among a platoon of 50,000 disciples would grin at this once-implausible sight. —Melissa Ruggieri, USA Today, 26 Aug. 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