: the failure of an output signal in an electronic reproducing system to reproduce an input signal faithfully
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/non'lin ee ar"i tee/, n.
1. Math. the quality of a function that expresses a relationship that is not one of direct proportion.
2. Elect. deviation of an input-output relationship from one of direct proportionality.
[1925-30; NON- + LINEARITY]
Useful english dictionary. 2012.