1. [ noun ] the state of being unsure of something
Synonyms: uncertainty doubtfulness dubiety dubiousness incertitude
Related terms: certainty cognitive_state incredulity indecision suspense misgiving mental_reservation
2. [ verb ] consider unlikely or have doubts about
Related terms: disbelieve
3. [ noun ] uncertainty about the truth or factuality of existence of something
Synonyms: question doubtfulness dubiousness

"the dubiousness of his claim" "there is no question about the validity of the enterprise"

Related terms: uncertainty wonder
4. [ verb ] consider unlikely or have doubts about
Synonyms: suspect distrust

"I doubt that she will accept his proposal of marriage"

Related terms: question disbelieve suspect
5. [ verb ] lack confidence in or have doubts about

"I doubt these reports" "I suspect her true motives" "she distrusts her stepmother"

Related terms: distrust