col ‧ on ‧ nade /ˌkɒləˈneɪd $ ˌkɑː-/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Language: French ; Origin: Italian colonnato , from colonna ; ⇨ ↑ colonel ]
a row of upright stone posts that usually support a roof or row of ↑ arch es
—colonnaded adjective