— incredibility, incredibleness , n. — incredibly , adv.
/in kred"euh beuhl/ , adj.
1. so extraordinary as to seem impossible: incredible speed.
2. not credible; hard to believe; unbelievable: The plot of the book is incredible.
[ 1375-1425; late ME incredibilis. See IN- 3 , CREDIBLE ]
Syn. 2. farfetched, astonishing, preposterous.