Pronunciation: (in"tru-duk'shun),[key] —n. 1. the act of introducing or the state of being introduced.
2. a formal personal presentation of one person to another or others.
3. a preliminary part, as of a book, musical composition, or the like, leading up to the main part.
4. an elementary treatise: an introduction to botany. 5. an act or instance of inserting.
6. something introduced.