RhymeZone: complementary definitions

Definitions of complementary:

noun: either one of two chromatic colors that when mixed together give white (in the case of lights) or gray (in the case of pigments)
adjective: of or relating to or suggestive of complementation
adjective: of words or propositions so related that each is the negation of the other
Example: "`male' and `female' are complementary terms"
adjective: acting as or providing a complement (something that completes the whole)