Synonyms: prefatorial, prefatory, introductory
Definition: serving as an introduction or preface
Similar words: preceding
Definition: existing or coming before
Synonyms: introductory
Definition: serving to open or begin
Usage: began the slide show with some introductory remarks
Similar words: opening
Definition: first or beginning
Usage: the memorable opening bars of Beethoven's Fifth; the play's opening scene
Synonyms: basic, introductory
Definition: serving as a base or starting point
Usage: a basic course in Russian; basic training for raw recruits; a set of basic tools; an introductory art course
Similar words: first
Definition: preceding all others in time or space or degree
Usage: the first house on the right; the first day of spring; his first political race; her first baby; the first time; the first meetings of the new party; the first phase of his training