Try Our Apps


Avoid these words. Seriously.


[an-tuh-nim] /ˈæn tə nɪm/
a word opposite in meaning to another. Fast is an antonym of slow.
Compare synonym (def 1).
Origin of antonym
First recorded in 1865-70; ant- + (syn)onym
Related forms
[an-ton-uh-muh s] /ænˈtɒn ə məs/ (Show IPA),
antonymic, adjective
antonymy, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for antonyms
Historical Examples
  • In the series we have prepared, the verbs are either synonyms or antonyms.

  • antonyms are words that are opposed to another word in meaning.

    Putnam's Word Book Louis A. Flemming
  • In many instances, however, a list of antonyms is unnecessary.

    Putnam's Word Book Louis A. Flemming
  • antonyms: unamenable, unaccountable, disobedient, insubmissive.

    Putnam's Word Book Louis A. Flemming
  • antonyms: disconnection, detachment, isolation, incoherence.

    Putnam's Word Book Louis A. Flemming
  • antonyms: accidental, unconscious, unpremeditated, unintentional.

    Putnam's Word Book Louis A. Flemming
  • antonyms: indistinction, indiscrimination promiscuity, obscurity.

    Putnam's Word Book Louis A. Flemming
  • antonyms: inharmonious, discordant, antagonistic, incompatible.

    Putnam's Word Book Louis A. Flemming
  • antonyms: unknowable, unascertainable, incognoscible, unrecognizable.

    Putnam's Word Book Louis A. Flemming
  • antonyms: unobtainable, unprocurable, unattainable, inaccessible.

    Putnam's Word Book Louis A. Flemming
British Dictionary definitions for antonyms


a word that means the opposite of another word: ``empty'' is an antonym of ``full''
Derived Forms
antonymous (ænˈtɒnɪməs) adjective
Word Origin
C19: from Greek antōnumia, from anti- + onoma name
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
Cite This Source
Word Origin and History for antonyms



1867, coined to serve as opposite of synonym, from Greek anti- "equal to, instead of, opposite" (see anti-) + -onym "name" (see name (n.)). Perhaps introduced to English in the book "Synonyms and Antonyms" (1867) by the Ven. C.J. Smith, M.A.

UNDER the head of Synonyms and Antonyms, Archdeacon Smith arranges words which form an antithesis to one another. The word "antonym" is, we believe, a new formation but useful. ["Journal of Sacred Literature," July 1867]
French antonyme (1842), German antonym (by 1859) are older. The un-Greek alternative counterterm has been left to fade.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
antonyms in Culture
antonyms [(an-tuh-nimz)]

Two words with opposite meanings. Cold and hot are antonyms; so are small and large. (Compare synonyms.)

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source

Word of the Day

Nearby words for antonyms

Word Value for antonyms

Scrabble Words With Friends