antagonym

noun
an·​tag·​o·​nym | \ an-ˈta-gə-ˌnim How to pronounce antagonym (audio) \
plural antagonyms

Definition of antagonym

: contronym … I think you've discovered a new antagonym … —a word with two opposite meanings. More familiar examples of antagonyms are cleave, which can mean either “cut apart” or “stick together”; and fast, as in “run fast” versus “hold fast.” — Barbara Wallraff, Times Union (Albany, New York), 18 Nov. 2007

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First Known Use of antagonym

1999, in the meaning defined above

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The first known use of antagonym was in 1999

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