D defs.my
Entry 3 senses Webster, 1913

Incredulous

/ĭnˌ-krĕj'-əl-əs/ · In·cred·u·lous · IPA /ˌɪnˈkɹɛ.d͡ʒə.ləs/
01 a. Not credulous; indisposed to admit or accept that which is related as true, skeptical; unbelieving.
  1. 1.
    Not credulous; indisposed to admit or accept that which is related as true, skeptical; unbelieving.
    “A fantastical incredulous fool.” — Bp. Wilkins.
  2. 2.
    Indicating, or caused by, disbelief or incredulity.
  3. 3.
    Incredible; not easy to be believed.[R.]