In early use: = Welsh rabbit; (more generally) grilled or melted cheese, often served on bread. Now chiefly (British): an open-faced cheese sandwich toasted under the grill or in front of a fire.
Origin
Late 16th century. From toasted + cheese.
Definition of toasted cheese in US English:
toasted cheese
nounˌtəʊstəd ˈtʃiːz
In early use: = Welsh rabbit; (more generally) grilled or melted cheese, often served on bread. Now chiefly (British): an open-faced cheese sandwich toasted under the grill or in front of a fire.