implausible

adjective

im·​plau·​si·​ble (ˌ)im-ˈplȯ-zə-bəl 

: not plausible : provoking disbelief

an implausible excuse

implausibility

(ˌ)im-ˌplȯ-zə-ˈbi-lə-tē 

noun

implausibly

(ˌ)im-ˈplȯ-zə-blē 

adverb

Synonyms of implausible

• incredible
• incredulous
• unlikely
• impossible
• unconvincing
• inconceivable
• unbelievable
• absurd
• ridiculous
• doubtful
• 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

In fact, this scenario would have been implausible until the last couple of years. — Michael McCann, Sportico.com, 17 Sep. 2026

Fitbit Sense 2 didn’t show a significant average bias in its accepted results, though 13% of its estimates were implausible. — Mike McRae 03, New Atlas, 3 Sep. 2026

Kading also rejected defense arguments that the prosecution’s account was implausible because Davis was not immediately killed in retaliation and because Knight later paid Anderson to testify on his behalf at a probation violation hearing. — Nancy Dillon, Rolling Stone, 2 Sep. 2026

Crypto-anarchy’s projects all involve an implausible degree of human commitment. — Finn Brunton, Harpers Magazine, 1 Sep. 2026

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