A preface or an introductory note, as for a book, especially by a person other than the author.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "foreword" in a sentence
"The book which this foreword is attached to looks like one to watch for."
"Given that the foreword is the first thing people will read, the rest of the book is gonna have a hard act to follow."
"The foreword is by John Lasseter, one of the founders of Pixar and friend of Miyazaki."