- serving as an introduction or preface

- serving to open or begin
"began the slide show with some introductory remarks"

- 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"

1. Serving to introduce something else; leading to the main subject or business; preliminary; prefatory; as, introductory proceedings; an introductory discourse.