Main Entry: an·to·nym

Pronunciation: \ˈan-tə-ˌnim\

Function: noun

Date: 1870

: a word of opposite meaning <the usual antonym of good is bad>

— an·to·nym·ic \ˌan-tə-ˈni-mik\ adjective

— an·ton·y·mous \an-ˈtä-nə-məs\ adjective

— an·ton·y·my \-mē\ noun