1. an introduction to a book, typically stating its subject, scope, or aims

1. to provide with a preface or introduction
2. to say or do something as an introduction to what follows

Examples

• The author wrote a brief preface explaining her research methods.
• In the preface, he thanked his family for their support.
• She prefaced her remarks with an apology.
• The speaker prefaced his presentation with a joke.
• The book’s preface was written by a famous historian.
• He prefaced the announcement by reviewing last year’s results.
• The preface gives readers important background information.