function - 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)

what something is used for

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

a relation such that one thing is dependent on another

a formal or official social gathering or ceremony

a vaguely specified social event

a set sequence of steps, part of larger computer program

function - verb

• perform as expected when applied
• serve a purpose, role, or function
• perform duties attached to a particular office or place or function

function - thesaurus

affair   go   map   mapping   occasion   office   officiate   operate   part   procedure   purpose   role   routine   run   serve   subprogram   subroutine   use   work