The state or quality of being doubtful; doubt; uncertainty.

plural of doubting

Alternative spelling of no doubt

plural of doubtfulness

plural of doubtful

uncertain, unclear, unsure

(law) A degree of uncertainty to which a reason can be assigned; in those jurisdictions influenced by English common law, the minimum degree of uncertainty required to acquit a defendant.

(philosophy) The philosophical idea proposed by Descartes that the world outside the self is subject to uncertainty.

Alternative form of without a doubt

plural of Cartesian doubt