Mathematics. a variable in a functional relation whose value determines the value or values of other variables, as x in the relation y = 3x2.Compare dependent variable(def 1).

British Dictionary definitions for independent variable

independent variable

noun

Also called: argumenta variable in a mathematical equation or statement whose value determines that of the dependent variable: in y = f(x), x is the independent variable

Also called: predictorstatisticsthe variable which an experimenter deliberately manipulates in order to observe its relationship with some other quantity, or which defines the distinct conditions in an experimentSee also experimental condition

In mathematics, a variable whose value determines the value of other variables. For example, in the formula for the area of a circle, A = πr2, r is the independent variable, as its value determines the value of the area (A). Compare dependent variable.