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

This makes regime change implausible. —Nick Paton Walsh, CNN Money, 26 Feb. 2026

The conference’s crash-and-burn scenario, while unlikely, is not implausible. —Jon Wilner, Mercury News, 24 Feb. 2026

By attempting to disqualify Bianco with attacks designed to excite conservative voters, Hilton may improve his odds of surviving the primary while reinforcing the image that makes a Republican statewide victory in California implausible. —Barnini Chakraborty, The Washington Examiner, 24 Feb. 2026

Her reappearance five weeks later, her implausible account of being kidnapped, and the evidence of her trysting with a married man scorched her reputation and took down some high-profile public figures. —Patt Morrison, Los Angeles Times, 21 Feb. 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