Mathematics. a variable in a functional relation whose value is determined by the values assumed by other variables in the relation, as y in the relation y = 3x2.Compare independent variable(def 1).

British Dictionary definitions for dependent variable

dependent variable

noun

a variable in a mathematical equation or statement whose value depends on that taken on by the independent variablein "y = f(x)", "y'"is the dependent variable

psycholstatisticsthe variable measured by the experimenter. It is controlled by the value of the independent variable, of which it is an index

In mathematics, a variable whose value is determined by the value of an independent variable. For example, in the formula for the area of a circle, A = πr2, A is the dependent variable, as its value depends on the value of the radius (r). Compare independent variable.