preface
noun
a preliminary statement in a book by the book's author or editor, setting forth its purpose and scope, expressing acknowledgment of assistance from others, etc.
Used to describe an ongoing action or state that is currently taking place in the immediate present.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
This explains the puzzling fact that the translator of Plato should so completely misunderstand the purpose of the dialogue he is prefacing.
From The International Monthly, Volume 3, No. 3, June, 1851 by Various