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
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"
move to and fro; "The shy student lingered in the corner"
be undecided about something; waver between conflicting positions or courses of action; "He oscillates between accepting the new position and retirement"