antonym

noun

1. a word that expresses a meaning opposed to the meaning of another word, in which case the two words are antonyms of each other

   noun.communication

   Examples

   To him the antonym of `gay' was `depressed'.

   Synonyms opposite opposite word

   Antonyms equivalent word synonym

   Source: WordNet 3.0

2. A word of opposite meaning; a counterterm; -- used as a correlative of <i>synonym</i>.

   noun

   Source: webster1913