n. 1 the act or an instance of introducing; the process of being introduced. 2 a formal presentation of one person to another. 3 an explanatory section at the beginning of a book etc. 4 a preliminary section in a piece of music, often thematically different from the main section. 5 an introductory treatise on a subject. 6 a thing introduced.
[ ME f. OF introduction or L introductio (as INTRODUCE) ]