dauphinoisPronunciation: /ˌdəʊfɪˈnwʌ/ (also dauphinoise /-ˈnwʌz/)Definition of dauphinois adjective (of potatoes or other vegetables) sliced and cooked in milk, typically with a topping of cheese. Origin:French, 'from the province of Dauphiné'dauphinois in other Oxford dictionaries Definition of dauphinois in the US English dictionary