WordReference Random House Learner's Dictionary of American English © 2017
- unbelieving; skeptical:He's incredulous about the claims of budget cuts.
- indicating or showing one's disbelief:gave me an incredulous look when I accused her of stealing.
in•cred•u•lous•ly, adv. See -cred-.
- not credulous;
disinclined or indisposed to believe;
- indicating or showing unbelief:an incredulous smile.
- Latin incrēdulus. See in-3, credulous
- unbelieving. See doubtful.