Definitions
1.adjective(of a set of points) Not lying on a straight line.
2.adjective(of a molecule) Whose atoms do not lie in a straight line.
3.adjective(of a function) Having a product of independent variables, or a variable with an exponent not equal to one.
4.adjective(of a system) Whose output is not directly proportional to its input.
5.adjectiveErratic and unpredictable; tending to jump back and forth."a film with a nonlinear plot"