Challenge about the truth or accuracy of a matter.
To lack confidence in; to disbelieve, question, or suspect.
consider unlikely or have doubts about
lack confidence in; "I doubt these reports"
uncertainty about the truth or factuality of existence of something; "the dubiousness of his claim"; "there is no question about the validity of the enterprise"
the state of being unsure of something
suspect to be false; "I distrust that man"
consider unlikely or have doubts about; "I doubt that she will accept his proposal of marriage"
lack confidence in or have doubts about; "I doubt these reports"; "I suspect her true motives"; "she distrusts her stepmother"
uncertainty about the truth or factuality or existence of something