ac‧knowl‧edge‧ment , acknowledgment
1 [uncountable and countable]
the act of admitting or accepting that something is true
We want an acknowledgement of the existence of the problem.
The reduction in their grant is an acknowledgement that they have been paid too much.
a movement of your body that shows that you have noticed someone or heard what they have said:
Basil nodded an acknowledgement as he entered the room.
He gave her a faint smile of acknowledgement.
3 [uncountable and countable]
the act of publicly thanking someone for something they have done
in acknowledgement of something
She received a special award in acknowledgement of all her hard work.
4 [uncountable and countable]
a letter written to tell someone that you have received their letter, message etc:
Do you want a written acknowledgement?
a short piece of writing at the beginning or end of a book in which the writer thanks all the people who have helped him or her