This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. having an opposite or diametrically opposed meaning

adj. of, or being an antonym

adj. of words: having opposite meanings

"The JJ crew are reassuringly ambivalent to Britney Spears e.g. “fabulously chic” and Britney Spears are antonymous … ouch."

complementary    contrary    converse    incompatible    contrastive    contradictory   

synonymous