introduction
Pronunciation:
/ˌɪntɹəˈdʌkʃən/noun
Definitions
The act or process of introducing.
Example: the introduction of a new product into the market
A means, such as a personal letter, of presenting one person to another.
An initial section of a book or article, which introduces the subject material.
A written or oral explanation of what constitutes the basis of an issue.