[oh graht-n, oh grat-n, aw graht-n, aw grat-n; Fr. oh gra-tan] 
| cooked or baked with a topping of either browned bread crumbs and butter or grated cheese, or with both. |
| au gra·tin (ō grät'n, grāt'n, grā-tāɴ') adj. Covered with bread crumbs and sometimes butter and grated cheese, and then browned in an oven: potatoes au gratin. [French : au, with the + gratin, scraping from the pan.] |