1. not done with purpose or intent (Freq. 1) - an unintended slight - an unintentional pun - the offense was unintentional - an unwitting mistake may be overlooked • Syn: unintentional, unplanned • Similar to: unintended 2. not aware or knowing - an unwitting subject in an experiment • Ant: witting • See Also: unaware, incognizant 3. unaware because of a lack of relevant information or knowledge - he was completely ignorant of the circumstances - an unknowledgeable assistant - his rudeness was unwitting • Syn: ignorant, unknowledgeable, unknowing • Similar to: uninformed • Derivationally related forms: unknowing (for: unknowing), unknowingness (for: unknowing), ignorance (for: ignorant)