Noun | 1. | range of a function - (mathematics) the set of values of the dependent variable for which a function is defined; "the image of f(x) = x^2 is the set of all non-negative real numbers if the domain of the function is the set of all real numbers" math, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement set - (mathematics) an abstract collection of numbers or symbols; "the set of prime numbers is infinite" |