antonym

[ an-tuh-nim ]
/ ˈæn tə nɪm /

noun

a word opposite in meaning to another. Fast is an antonym of slow.Compare synonym (def. 1).

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Origin of antonym

First recorded in 1865–70; ant- + (syn)onym

OTHER WORDS FROM antonym

an·ton·y·mous [an-ton-uh-muhs], /ænˈtɒn ə məs/, an·to·nym·ic, adjectivean·ton·y·my, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for antonym

British Dictionary definitions for antonym

antonym
/ (ˈæntənɪm) /

noun

a word that means the opposite of another word``empty'' is an antonym of ``full''

Derived forms of antonym

antonymous (ænˈtɒnɪməs), adjective

Word Origin for antonym

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