Serving as an introduction; preliminary or preparatory. The professor gave an introductory lecture to outline the course objectives.
Relating to the beginning of a book, speech, or other text. The introductory chapter of the novel sets the scene for the unfolding drama.
Offered at a special reduced price or with special conditions when a product or service is first made available. The bank is advertising an introductory interest rate of 0% for the first year.