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.


Nearby words

  1. complemental,
  2. complemental air,
  3. complementally,
  4. complementarity,
  5. complementarity principle,
  6. complementary air,
  7. complementary angle,
  8. complementary angles,
  9. complementary base,
  10. complementary cells

Origin of complementary

First recorded in 1590–1600; complement + -ary

Related formscom·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 complementary


British Dictionary definitions for complementary

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 Formscomplementarily 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

Word Origin and History for complementary

complementary

adj.

1620s, "ceremonious," from complement + -ary. Sense "forming a complement" attested from 1829, earliest in complementary colors.

Online Etymology Dictionary, © 2010 Douglas Harper