1. • 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)
   • noun - what something is used for
   • noun - the actions and activities assigned to or required or expected of a person or group
   • noun - a relation such that one thing is dependent on another
   • noun - a formal or official social gathering or ceremony
   • noun - a vaguely specified social event
   • noun - a set sequence of steps, part of larger computer program
   • verb - perform as expected when applied
   • verb - serve a purpose, role, or function
   • verb - perform duties attached to a particular office or place or function
2. • The action for which one is particularly fitted or employed.
   • Assigned duty or activity.
   • A specific occupation or role: in my function as chief editor.
   • An official ceremony or a formal social occasion.
   • Something closely related to another thing and dependent on it for its existence, value, or significance: Growth is a function of nutrition.
   • Abbr.
   • A variable so related to another that for each value assumed by one there is a value determined for the other.
   • The central meaning shared by these nouns is “the actions and activities assigned to, required of, or expected of a person”: the function of a teacher; a bank clerk’s duty; assumed the office of financial adviser; the role of a parent.
3. • v - to be in action

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