Added 9 October 2026 antonymous /ænˈtɒn.ɪ.məs/ adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about antonymous at Wordnik → Where our words come from → Of words: having opposite meanings. Related Words: contrarycontradictorycontrastiveincompatibleconversecomplementaryantilogousantitheticantipodaloppositecounterdirectionalcontrariant Back to today's word