/ ɪkˈstɪəriə(r); NAmE -ˈstɪr-/ noun , adjective
[ C ] the outside of sth, especially a building :
The exterior of the house needs painting.
[ sing. ] the way that sb appears or behaves, especially when this is very different from their real feelings or character :
Beneath his confident exterior, he was desperately nervous.
[ usually before noun ] on the outside of sth; done or happening outdoors :
exterior walls / surfaces
The filming of the exterior scenes was done on the moors.
early 16th cent.: from Latin , comparative of exter outer.