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English definition of “antonym”

antonym

noun [C]     /ˈæn.tə.nɪm/ US  /-t̬ən.ɪm/ specialized
a word that means the opposite of another word: Two antonyms of " light " are " dark " and " heavy ". → Compare synonymTerminology and vocabulary synonymGrammar:Gradable opposites (antonyms) antonymous     /ænˈtɒn.ɪ.məs/ US  /-ˈtɑː.nɪ-/ adjective " Long " and " short " are antonymous (words).OppositesTerminology and vocabulary
(Definition of antonym noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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