What is the meaning of Function?

What something does or is used for.

A professional or official position.

An official or social occasion.

A party.

Something which is dependent on or stems from another thing; a result or concomitant.

A relation where one thing is dependent on another for its existence, value, or significance.

A relation in which each element of the domain is associated with exactly one element of the codomain.

A routine that receives zero or more arguments and may return a result.

The physiological activity of an organ or body part.

The characteristic behavior of a chemical compound.

The role of a social practice in the continued existence of the group.

To have a function.

To carry out a function; to be in action.

function (what something's intended use is)

Source: wiktionary.org