I. cas ‧ se ‧ role 1 /ˈkæsərəʊl $ -roʊl/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Language: French ; Origin: 'cooking pan' , from casse 'big spoon, pan' , from Greek kyathos 'big spoon' ]
1 . food that is cooked slowly in liquid in a covered dish in the ↑ oven :
chicken casserole
2 . a deep covered dish used for cooking food in an oven
II. casserole 2 BrE AmE verb [transitive]
to cook food in a casserole