complementary

[ kom-pluh-men-tuh-ree, -tree ]
/ ˌkɒm pləˈmɛn tə ri, -tri /

adjective

forming a complement; completing.
complementing each other.

noun, plural com·ple·men·ta·ries.

Origin of complementary

First recorded in 1590–1600; complement + -ary

Related forms

com·ple·men·ta·ri·ness, nounun·com·ple·men·ta·ry, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for complementaries

British Dictionary definitions for complementaries

complementary

complemental

/ (ˌkɒmplɪˈmɛntərɪ, -trɪ) /

adjective

acting as or forming a complement; completing
forming a satisfactory or balanced whole
forming a mathematical complementsine and cosine are complementary functions
maths logic (of a pair of sets, etc) mutually exclusive and exhaustive, each being the complement of the other
(of genes) producing an effect in association with other genes
involving or using the treatments and techniques of complementary medicine

Derived Forms

complementarily or complementally, adverbcomplementariness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012