antonym
noun /ˈæntənɪm/
/ˈæntənɪm/
(specialist)- a word that means the opposite of another word synonym opposite
- ‘Old’ has two possible antonyms: ‘young’ and ‘new’.
- a dictionary of antonyms
Word Originmid 19th cent.: from French antonyme, from ant- (from Greek anti- ‘against’) + Greek onuma ‘a name’.