uk ​ /meɪˈlɑ̃ːʒ/ us ​ /meɪˈlɑ̃ːʒ/ formal. › a mixture, or a group of different things or people: Her book presents an interesting mélange of ideas. The dessert was described as a mélange of summer fruits in a light syrup. Thesaurus: synonyms and related words. Variety and mixtures. all manner of sth idiom.