'Incredible' definitions:

Definition of 'incredible'

From: WordNet
adjective
Beyond belief or understanding; "at incredible speed"; "the book's plot is simply incredible" [syn: incredible, unbelievable] [ant: believable, credible]

Definition of 'Incredible'

From: GCIDE
  • Incredible \In*cred"i*ble\, a. [L. incredibilis: cf. OF. incredible. See In- not, and Credible.] Not credible; surpassing belief; too extraordinary and improbable to admit of belief; unlikely; marvelous; fabulous. [1913 Webster]
  • Why should it be thought a thing incredible with you, that God should raise the dead? --Acts xxvi. 8. [1913 Webster]