What does unbelievable mean in English?

You can learn unbelievable Pronunciation, Grammar & Synonyms in this most authoritative English Dictionary.

unbelievable Meaning, Definition, Pronunciation, Grammar & Synonyms❤️

0 extremely surprising:
- She eats an unbelievable amount of food.
- You've had such bad luck it's unbelievable.
- You should see her wardrobe - it's unbelievable - she's got about 50 pairs of shoes.
1 unable to be believed because unlikely:
- I thought most of the characters in the play were totally unbelievable.
2 extremely surprising:
- That little dog eats an unbelievable amount of food.
3 not able to be believed because unlikely:
- an unbelievable story/excuse
- unbelievable luck

Management have demonstrated almost unbelievable incompetence in their handling of the dispute.
That anyone could be treated so badly - it's unbelievable.
The cost of the building was unbelievable.
His statement showed unbelievable arrogance.
It's unbelievable that anyone could be so rude!
Apparently, the petitioners found it unbelievable the delegate would simply fail to respond to their petition.
If the span were trebled, to an unbelievable dimension of nearly 100m, with the member sizes increased in proportion, then the nominal stresses would be increased by only 75%.
We made the point that some of the evidence was so fantastic that it was unbelievable.