To question or hold questionable; to withhold assent to; to hesitate to believe, or to be inclined not to believe; to withhold confidence from; to distrust; as, I have heard the story, but I doubt the truth of it
To waver in opinion or judgment; to be in uncertainty as to belief respecting anything; to hesitate in belief; to be undecided as to the truth of the negative or the affirmative proposition; to b e undetermined
If you are in doubt about something, you feel unsure or uncertain about it. He is in no doubt as to what is needed When in doubt, call the doctor
emphasis If you say that something is true without doubt or without a doubt, you are emphasizing that it is definitely true. Without doubt this was the most important relationship I developed at college = undoubtedly
If you doubt whether something is true or possible, you believe that it is probably not true or possible. Others doubted whether that would happen He doubted if he would learn anything new from Marie She doubted that the accident could have been avoided
If you doubt someone or doubt their word, you think that they may not be telling the truth. No one directly involved with the case doubted him trust
If you have doubt or doubts about something, you feel uncertain about it and do not know whether it is true or possible. If you say you have no doubt about it, you mean that you are certain it is true. This raises doubts about the point of advertising I had my doubts when she started, but she's getting really good There can be little doubt that he will offend again = uncertainty
You say I doubt it as a response to a question or statement about something that you think is untrue or unlikely. `Somebody would have seen her.' --- `I doubt it, not on Monday.'
emphasis You use no doubt to emphasize that something seems certain or very likely to you. The contract for this will no doubt be widely advertised = undoubtedly
If you doubt something, you believe that it might not be true or genuine. No one doubted his ability