Meaning

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

originFrom French antonyme (1840s and 1850s), which was modeled on earlier synonyme and influenced by the etymons of Ancient Greek ἀντωνυμία (antōnumía, “pronoun”); credit for popularization of the French loanword's naturalization into English is given principally to Charles John Smith and his 1867 book Synonyms and Antonyms: Or, Kindred Words and Their Opposites. Collected and Contrasted. By surface…

Etymology from Wiktionary, CC BY-SA 3.0