n
1. uncertainty about the truth, fact, or existence of something (esp in the phrases in doubt, without doubt, beyond a shadow of doubt, etc.)
2. (often plural) lack of belief in or conviction about something all his doubts about the project disappeared
3. an unresolved difficulty, point, etc.
4. (Philosophy) Philosophy the methodical device, esp in the philosophy of Descartes, of identifying certain knowledge as the residue after rejecting any proposition which might, however improbably, be false
5. Obsolete fear
give (someone) the benefit of the doubt to presume (someone suspected of guilt) innocent; judge leniently
no doubt almost certainly
