Definition of "Function" :

noun: the actions and activities assigned to or required or expected of a person or group

"The function of a teacher."

noun: what something is used for

"The function of an auger is to bore holes."

noun: a set sequence of steps, part of larger computer program

noun: a vaguely specified social event

"A seemingly endless round of social functions."

noun: a formal or official social gathering or ceremony

"It was a black-tie function."

noun: a relation such that one thing is dependent on another

"Height is a function of age."

noun: (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)

verb: perform duties attached to a particular office or place or function

verb: perform as expected when applied

verb: serve a purpose, role, or function

"The table functions as a desk."