Noun

(en noun)

(British) The act of acknowledging; admission; avowal; owning; confession.

(British) The act of owning or recognizing in a particular character or relationship; recognition as regards the existence, authority, truth, or genuineness.

(British) An award or other expression or token of appreciation.

(British) An expression of gratitude.

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

a wedding invitation's acknowledgement

(British, telecommunications, computing, networking) A response sent by a receiver to indicate successful receipt of a transmission.

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(British, legal) The act of a man admitting a child as his own.

(British, legal) A formal statement or document recognizing the fulfilment or execution of a legal requirement or procedure.

Noun

(uncountable) Mental, sometimes emotional process of comprehension, assimilation of knowledge, which is subjective by its nature.

(countable) Reason or intelligence, ability to grasp the full meaning of knowledge, ability to infer.

(countable) Opinion, judgement or outlook.

* {{quote-magazine, date=2013-08-03, volume=408, issue=8847, magazine=(The Economist)

, title= The machine of a new soul , passage=The yawning gap in neuroscientists’ understanding of their topic is in the intermediate scale of the brain’s anatomy. Science has a passable knowledge of how individual nerve cells, known as neurons, work. It also knows which visible lobes and ganglia of the brain do what. But how the neurons are organised in these lobes and ganglia remains obscure.}}

(countable) An informal contract, mutual agreement.

(countable) A reconciliation of differences.

(uncountable) Sympathy.

All that people individually sense and feel of themselves.