incredulous

UK: /ɪnˈkrɛdjʊləs/ US: /ɪnˈkrɛdʒələs/ ,(in krej′ə ləs)

WordReference Random House Learner's Dictionary of American English © 2025

in•cred•u•lous /ɪnˈkrɛdʒələs/   adj. 

1. unbelieving; skeptical:
   He's incredulous about the claims of budget cuts.
2. indicating or showing one's disbelief:
   gave me an incredulous look when I accused her of stealing.

in•cre•du•li•ty /ɪnkrɪˈdulɪti, -ˈdyu-/  n. [uncountable]
in•cred•u•lous•ly, adv. See -cred-.

WordReference Random House Unabridged Dictionary of American English © 2025

in•cred•u•lous  (in krej′ə ləs), adj. 

1. not credulous;
   disinclined or indisposed to believe;
   skeptical.
2. indicating or showing unbelief:
   an incredulous smile.

• Latin incrēdulus. See in-³, credulous
• 1525–35

in•cred′u•lous•ly, adv. 
in•cred′u•lous•ness, n. 
Synonyms

unbelieving. See doubtful. 

Collins Concise English Dictionary © HarperCollins Publishers::

incredulous / ɪnˈkrɛdjʊləs/ adjective

1. (often followed by of) not prepared or willing to believe (something); unbelieving

inˈcredulously adverb

inˈcredulousness noun