doubt definition

1. the state of being unsure of something
2. uncertainty about the truth or factuality or existence of something
• examples: the dubiousness of his claim
• examples: there is no question about the validity of the enterprise
3. consider unlikely or have doubts about
• examples: I doubt that she will accept his proposal of marriage
4. lack confidence in or have doubts about
• examples: I doubt these reports
• examples: I suspect her true motives
• examples: she distrusts her stepmother