Source : Webster's Revised Unabridged Dictionary (1913)

Unwitting \Un*wit"ting\, a.
   Not knowing; unconscious; ignorant. -- {Un*wit"ting*ly}, adv.

Source : WordNet®

unwitting
     adj 1: not intentional; "an unintended slight"; "an unintentional
            pun"; "the offense was unintentional"; "an unwitting
            mistake may be overlooked" [syn: {unintentional}, {unplanned}]
     2: not aware or knowing; "an unwitting subject in an
        experiment" [syn: {unaware}] [ant: {witting}]
     3: lacking information or knowledge; "an unknowledgeable
        assistant" [syn: {ignorant}, {unknowledgeable}, {unknowing}]