acknowledgement
🇺🇸
/əkˈnɑːlɪdʒmənt/
🇬🇧
/əkˈnɒlɪdʒmənt/
accepting that something is true or exists
Her nod was an acknowledgement that she heard me.
showing thanks for something someone did
The gift was an acknowledgement of your help.
a message saying something was received
Please send an acknowledgement when you get the package.
thanks to helpers in a book or project
The book's acknowledgements thank many people for their support.