Source : Webster's Revised Unabridged Dictionary (1913)

Introductory \In`tro*duc"to*ry\, a. [L. itroductorius: cf. F.
   introductoire.]
   Serving to introduce something else; leading to the main
   subject or business; preliminary; prefatory; as, introductory
   proceedings; an introductory discourse.

Source : WordNet®

introductory
     adj 1: serving to open or begin; "began the slide show with some
            introductory remarks"
     2: serving as a base or starting point; "a basic course in
        Russian"; "basic training for raw recruits"; "a set of
        basic tools"; "an introductory art course" [syn: {basic}]
     3: serving as an introduction or preface [syn: {prefatorial}, {prefatory}]