Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: incredulous  in'kred-yu-lus or in'kre-ju-lus
  1. Not disposed or willing to believe; unbelieving
    "He gave an incredulous look when told about the unlikely coincidence"

See also: disbelieving, distrustful, incredible, sceptical [Brit, Cdn], skeptical [N. Amer], unbelievable, unbelieving

Antonym: credulous