Source : Webster's Revised Unabridged Dictionary (1913)

Guiltless \Guilt"less\, a.
   1. Free from guilt; innocent.

            The Lord will not hold him guiltless that taketh his
            name in vain.                         --Ex. xx. 7.

   2. Without experience or trial; unacquainted (with).

            Such gardening tools, as art, yet rude, Guiltless of
            fire, had formed.                     --Milton.
      -- {Guilt"less*ly}, adv. -- {Guilt"less*ness}, n.

Source : WordNet®

guiltlessness
     n : a state of innocence [syn: {blamelessness}, {inculpability},
          {inculpableness}]