What is the meaning of Acknowledgment?

The act of acknowledging

The act of recognizing in a particular character or relationship; recognition of existence, authority, truth, or genuineness.

A reward or other expression or token of gratitude.

An expression of gratitude for a benefit or an obligation.

A message from the addressee informing the originator that the originator's communication has been received and understood.

A response (ACK) sent by a receiver to indicate successful receipt of a transmission (See Wikipedia article on transmission).

A recognition as genuine or valid; an avowing or admission in legal form.

The act of a person admitting a child as their own.

A formal statement or document recognizing the fulfillment or execution of a legal requirement or procedure.

Source: wiktionary.org