incredible Meaning, Definition & Usage

  1. adjective beyond belief or understanding
    unbelievable.
    • at incredible speed
    • the book's plot is simply incredible

WordNet

In*cred"i*ble adjective
Etymology
L. incredibilis: cf. OF. incredible. See In- not, and Credible.
Definitions
  1. Not credible; surpassing belief; too extraordinary and improbable to admit of belief; unlikely; marvelous; fabulous.
    Why should it be thought a thing incredible with you, that God should raise the dead? Acts xxvi. 8.

Webster 1913