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antonym

noun [C]
 
 
/ˈæn.tə.nɪm/ US  /-t̬ən.ɪm/ specialized

Definition

a word that means the opposite of another word: Two antonyms of 'light' are 'dark' and 'heavy'. → Compare synonymTerminology and vocabulary 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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