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

The number of brands from ABG that are out there living unbelievable lives outside in the U.S. was eye-opening. —Tianwei Zhang, Footwear News, 15 May 2025

To be recognized among this incredible group of artists is an unbelievable honor and beyond my wildest dreams. —Seija Rankin, HollywoodReporter, 9 May 2025

Continue reading … -- POLITICS 'BEST PICK' – Senators react to 'unbelievable' news of first American pope being elected. —FOXNews.com, 9 May 2025

The overwhelming support that my family and myself have received is unbelievable! —Khaleda Rahman, MSNBC Newsweek, 7 May 2025

Word History

First Known Use

1548, in the meaning defined above

Rhymes for unbelievable

• achievable
• believable
• conceivable
• perceivable
• receivable
• retrievable
• inconceivable
• irretrievable

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