Source : Webster's Revised Unabridged Dictionary (1913)

Tutorial \Tu*to"ri*al\, a. [L. tutorius.]
   Of or pertaining to a tutor; belonging to, or exercised by, a
   tutor.

Source : WordNet®

tutorial
     adj : of or relating to tutors or tutoring; "tutorial sessions"

tutorial
     n : a session of intensive tuition given by a tutor to an
         individual or to a small number of students