MORNAY Meaning of MORNAY in English [ 'mɔ:neɪ ]■ adjective denoting or served in a cheese-flavoured white sauce.Originperh. named after Mornay , eldest son of the French chef Joseph Voiron, the inventor of the sauce. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004