from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Skeptical; disbelieving: incredulous of stories about flying saucers.
- adj. Expressive of disbelief: an incredulous stare.
from the GNU version of the Collaborative International Dictionary of English
- adj. Not credulous; indisposed to admit or accept that which is related as true, skeptical; unbelieving.
- adj. Indicating, or caused by, disbelief or incredulity.
- adj. Incredible; not easy to be believed.
from The Century Dictionary and Cyclopedia
- Not credulous; not disposed to admit the truth of what is related; not given to believe readily; refusing or withholding belief; skeptical.
- Not easy to be believed; incredible.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. not disposed or willing to believe; unbelieving
From Latin incrēdulus : in-, not; see in-1 + crēdulus, believing; see credulous.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin incredulus ("unbelieving"). (Wiktionary)