cronut UK /ˈkɹəʊnʌt/US /ˈkɹoʊ(ˌ)nʌt/ noun1 •A pastry which combines characteristics of a croissant and a doughnut. A croissant-based donut. A breadstuff shaped like a donut and made from croissant dough.Could it have been a hybrid, a marriage of croissant and doughnut? The Cronut? The Doughsant? — 1991 formscronuts