Meaning

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

originEtymology tree Old French fonction Middle French functionbor. English function From Middle French function, from Old French fonction, from Latin functiō (“performance, execution”), from functus, perfect participle of fungor (“to perform, execute, discharge”), from Proto-Indo-European *bʰewg- (“to enjoy”).

Etymology from Wiktionary, CC BY-SA 3.0