cor ‧ nice /ˈkɔːnəs, ˈkɔːnɪs $ ˈkɔːr-/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: French ; Origin: Italian , perhaps from Greek koronis 'stone put on top of a wall' ]
wood or ↑ plaster that runs along the top edge of a wall, used for decoration:
A carved cornice runs around the high-ceilinged room.