English Language Learners Definition of acknowledgment. : the act of showing that you know, admit, or accept that something exists or is true. : the act of praising or thanking someone for an action or achievement. : a section of a book, article, etc., in which people are thanked for their help. See the full definition for acknowledgment in ...

acknowledgments [ plural ] (also acknowledgements) a short text at the beginning or end of a book where the writer names people or other works that have helped in writing the book. SMART Vocabulary: related words and phrases. Accepting & agreeing. accepting.