non·lin·e·ar (nŏn-lĭnē-ər)
adj.
► Not in a straight line.
► Mathematics.
■ Occurring as a result of an operation that is not linear.
■ Containing a variable with an exponent other than one. Used of an equation.
►
■ Of or relating to a system of equations whose effects are not proportional to their causes. Such a set of equations can be chaotic.
■ Of or relating to a device whose behavior is described by a set of nonlinear equations and whose output is not proportional to its input.
■ Of or relating to the output of such a device.

[TahlilGaran] American Dictionary ▲