Definition of Introductory

Adjective: introductory  ,in-tru'dúk-t(u-)ree

1. Serving to open or begin
   "began the slide show with some introductory remarks"
    
2. Serving as a base or starting point
   "an introductory art course";
   - basic
    
3. Serving as an introduction or preface
   "The introductory remarks of the author lacked detail";
   - prefatorial, prefatory

See also:
introductorily
introfied