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Definition of unbelievable

unbelievable

/ˌʌnbɪˈliːvəbəl/
un · be · liev · a · ble
Adverb:unbelievably
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unbelievable Lexical Profile

unbelievable Game Scores & Validity

• adjective

1

Extraordinarily great, impressive, or astonishing in degree, quality, or scale.

Example

"The marathon runner showed unbelievable stamina during the final miles of the race."

2

So unlikely, improbable, or far-fetched as to be difficult or impossible to accept as true.

Example

"The witness gave an unbelievable account of the evening's events that failed to convince the jury."

Synonyms
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Antonyms
View all antonyms for unbelievable

• Rhymes for unbelievable

• Nearby Words

unbeknownst
unbelief
unbelievability
unbelievable
unbelievably
unbelieved
unbeliever

Cite this Entry

Wordmom. (2026). Definition of Unbelievable. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/unbelievable
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