What something does or is used for.

A professional or official position.

An official or social occasion, and in slang, it can also refer to 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.

(mathematics) English Wikipedia has an article on:Function (mathematics)Wikipedia A relation in which each element of the domain is associated with exactly one element of the codomain.

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

(biology) The physiological activity of an organ or body part.

(chemistry) The characteristic behavior of a chemical compound.

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

(intransitive) To have a function.

(intransitive) To carry out a function; to be in action.