melonious UK /mɛˈləʊni.əs/US /mɛˈloʊni.əs/ adjective6 •(humorous) Relating to melons. •(humorous) Resembling or having the characteristics of a melon.The Missouri melon, to put it briefly, is the most melonious of melons. — 1920 •(UK, euphemistic) Curvaceous. •(UK, humorous) Very large.Only occasionally, jacketless in her customary brown or gray silk blouse and ramrod straight in her typing chair, did she reveal superb melonious breasts cantilevered over a trim waist. — 1987 •(UK, humorous) Very buxom; having large breasts. •(nonstandard, rare) Melodious.Tilly. 'Rastus, am it yer melonious voice dat speaks dese words? — 1888 formsmore melonious · most melonious