antonym - Definitions from Dictionary.com

an·to·nym Audio Help (ān'tə-nĭm') Pronunciation Key
n. A word having a meaning opposite to that of another word: The word wet is an antonym of the word dry.

[ant(i)- + -onym.]

an'to·nym'ic adj., an·ton'y·mous (ān-tŏn'ə-məs) adj., an·ton'y·my n.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
antonym

1870, created to serve as opposite of synonym, from Gk. anti- "equal to, instead of, opposite" (see anti-) + -onym "name" (see name).

WordNet - Cite This Source - Share This

antonym
noun
a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other; "to him the antonym of 'gay' was 'depressed'" [ant: equivalent word]

Kernerman English Multilingual Dictionary - Cite This Source - Share This
antonym [ˈӕntənim] noun

a word opposite in meaning to another word
Example: Big and small are antonyms.

Arabic:	كَلِمَة مُناقِضَه، ضِد
Chinese (Simplified):	反义词
Chinese (Traditional):	反義詞
Czech:	antonymum
Danish:	antonym
Dutch:	antoniem
Estonian:	antonüüm
Finnish:	vastakohta
French:	antonyme
German:	das Antonym
Greek:	αντώνυμο (γραμμ.)
Hungarian:	ellentétes értelmű szó
Icelandic:	andheiti
Indonesian:	lawan kata
Italian:	antonimo

Japanese:	反意語
Korean:	반의어
Latvian:	antonīms
Lithuanian:	antonimas
Norwegian:	antonym
Polish:	antonim
Portuguese (Brazil):	antônimo
Portuguese (Portugal):	antónimo
Romanian:	antonim
Russian:	антоним
Slovak:	antonymum
Slovenian:	antonim
Spanish:	antónimo
Swedish:	antonym
Turkish:	karşıt anlamlı sözcük

Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Antonym

An"to*nym\, n. [Gr. ? a word used in substitution for another; ? + ?, ?, a word.] A word of opposite meaning; a counterterm; -- used as a correlative of synonym. [R.] --C. J. Smith.

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