- adjective used to describe an electronic circuit whose output does not change linearly in proportion to its input
- Not in the shape of a straight line. Also, pertaining to that which is not in the shape of a straight line.
- A relationship in which one value is not directly proportional to another. For instance, an electronic device whose output is not directly proportional to its input. When such a response is graphed, the result is a curve. Also, pertaining to such a relationship.
- Not following the course of a straight line. Also, that which is described by a path which is not a straight line.