unbelievable.
Not to be believed.
Meaning & usage
Not to be believed.
Amazing, astonishing; so surprising that one is almost, or figuratively, unable to believe.
The most unbelievable thing happened to me today!
This restaurant makes unbelievable pizza!
Implausible or improbable.
His excuse seems rather unbelievable.
Where this word comes from
From un- + believable.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.