Synonyms: antonymous
Definition: of words: having opposite meanings
Similar words: complementary
Definition: of words or propositions so related that each is the negation of the other
Usage: `male' and `female' are complementary terms
Similar words: contradictory
Definition: of words or propositions so related that both cannot be true and both cannot be false
Usage: `perfect' and `imperfect' are contradictory terms
Similar words: contrary
Definition: of words or propositions so related that both cannot be true but both may be false
Usage: `hot' and `cold' are contrary terms
Similar words: contrastive, incompatible
Definition: of words so related that one contrasts with the other
Usage: `rich' and `hard-up' are contrastive terms
Similar words: converse
Definition: of words so related that one reverses the relation denoted by the other
Usage: `parental' and `filial' are converse terms