röstiPronunciation: /ˈrəːsti/Definition of rösti noun (plural same) [mass noun] a Swiss dish of grated potatoes formed into a small flat cake and fried: the Swiss rösti, which is close to being their national home dish, is made with cooked potatoes [count noun] a flat cake of grated potato: place 4 of the rösti in the panOrigin: 1950s: from Swiss Germanrösti in other Oxford dictionaries Definition of rösti in the US English dictionary