introduction >> ˌɪntrəˈdʌkʃ(ə)n
Definition: [noun] the action of introducing something.
Example: issues arising from the introduction of new technology
Definition: [noun] a formal presentation of one person to another, in which each is told the other's name.
Example: he returned to his desk, leaving Michael to make the introductions
Definition: [noun] a thing preliminary to something else, especially an explanatory section at the beginning of a book, report, or speech.
Example: your talk will need an introduction which states clearly what you are talking about and why