threshold function vs function

threshold function and function both are nouns.

Word	Noun	Adjective	Verb	Adverb
threshold function	Yes	No	No	No
function	Yes	No	Yes	No

As nouns, function is a hypernym of threshold function; that is, function is a word with a broader meaning than threshold function:

threshold function: a function that takes the value 1 if a specified function of the arguments exceeds a given threshold and 0 otherwise
function: (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)

Other hypernyms of threshold function include map, mapping, mathematical function, single-valued function.

threshold function (noun)	function (noun)
a function that takes the value 1 if a specified function of the arguments exceeds a given threshold and 0 otherwise	the actions and activities assigned to or required or expected of a person or group
	what something is used for
	a set sequence of steps, part of larger computer program
	a formal or official social gathering or ceremony of people
	a formal or official social gathering or ceremony
	(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)
	a relation such that one thing is dependent on another

threshold function (verb)	function (verb)
	perform duties attached to a particular office or place or function
	perform as expected when applied
	serve a purpose, role, or function