ac·knowl·edg·ment also ac·knowl·edge·ment 
/ɪkˈnɑ:lɪʤmənt/ noun
plural ac·knowl·edg·ments /ɪkˈnɑ:lɪʤmənt/ noun 1 : the act of acknowledging something or someone: such as a : the act of showing that you know, admit, or accept that something exists or is true [count] ▪ The killer's apology was an acknowledgment [=admission] of his guilt. = The killer's apology was an acknowledgment that he was guilty. ▪ The day passed without any acknowledgment that it was their wedding anniversary. [=no one mentioned that it was their wedding anniversary] ▪ They made several public acknowledgments of their company's mistake. [noncount] ▪ He paid the fine without acknowledgment of his guilt.
b : the act of praising or thanking someone for an action or achievement [count] ▪ Special acknowledgments will be made at the end of the meeting. [noncount] ▪ He has finally received the acknowledgment he deserves for his charitable work. ▪ They presented him with an award in acknowledgment of his charitable work. 2 acknowledgments [plural] : a section of a book, article, etc., in which people are thanked for their help
▪ He's the first person mentioned in the book's acknowledgments. 3 [count] : a usually written statement saying that a letter or message was received
▪ We sent an acknowledgment that we received their letter. ▪ He never received an acknowledgment of his payment.
b : the act of praising or thanking someone for an action or achievement [count] ▪ Special acknowledgments will be made at the end of the meeting. [noncount] ▪ He has finally received the acknowledgment he deserves for his charitable work. ▪ They presented him with an award in acknowledgment of his charitable work.
▪ He's the first person mentioned in the book's acknowledgments.
▪ We sent an acknowledgment that we received their letter. ▪ He never received an acknowledgment of his payment.
