(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
serve a purpose, role, or function
being or characteristic of a single thing or person
(usually used in combination) having value of a specified kind
a base hit on which the batter stops safely at first base
