unbelievable

Definitions

So great, extreme, or improbable as to be difficult to believe.

Extremely good or impressive.

Examples

It is truly unbelievable that he managed to finish the marathon in under three hours.

The view from the top of the mountain was absolutely unbelievable.

She told an unbelievable story about meeting a celebrity in a small grocery store.

Synonyms

incredible implausible unlikely astonishing stunning fabulous extraordinary

Antonyms

believable credible plausible likely probable convincing reasonable