nonlinear

adj

1. (not-comparable)Of a set of points, not lying on a straight line.
2. (not-comparable)Of a molecule, whose atoms do not lie in a straight line.
3. (not-comparable)Of a function, having a product of independent variables, or a variable with an exponent not equal to one.
4. (not-comparable)Of a system, whose output is not directly proportional to its input.
5. (not-comparable)Erratic and unpredictable; tending to jump back and forth.

   “a film with a nonlinear plot”