unbelievable

adjective

un·​be·​liev·​able ˌən-bə-ˈlē-və-bəl 

: too improbable for belief

the plot is unreal and unbelievable

also : of such a superlative degree as to be hard to believe

the destruction was unbelievable

made an unbelievable catch in center field

unbelievably

ˌən-bə-ˈlē-və-blē 

adverb

Synonyms

• fantastic
• fantastical
• implausible
• inconceivable
• incredible
• incredulous
• uncompelling
• unconceivable
• unconvincing
• unimaginable
• unthinkable

Examples of unbelievable in a Sentence

a completely unbelievable story about why there was lipstick on his collar

Recent Examples on the Web

Webster delves into the unbelievable, bizarre, and sad story of Riley, whose secret shattered a family and stunned a community. —Doc Louallen, ABC News, 31 Jan. 2025

All of which ignores the unbelievable luck and privilege of being born into a functional family with a safe place to live and plenty to eat. —Heidi Stevens, Chicago Tribune, 31 Jan. 2025

His jump cuts are unbelievable, but that’s only part of what makes Philadelphia’s running game special. —Mike Preston, Orlando Sentinel, 30 Jan. 2025

The three of you guys together is unbelievable – talk about energy and just a force, all three of you. —Tracy Wright, Fox News, 28 Jan. 2025

Word History

First Known Use

1548, in the meaning defined above

Kids Definition

unbelievable

adjective

un·​be·​liev·​able ˌən-bə-ˈlē-və-bəl 

1

: too unlikely for belief

an unbelievable story

2

: very significant or impressive

made an unbelievable catch in center field

unbelievably

-blē 

adverb