I. ex ‧ te ‧ ri ‧ or 1 /ɪkˈstɪəriə $ -ˈtɪriər/ BrE AmE noun [countable]
1 . [usually singular] the outside of something, especially a building OPP interior
the exterior of the factory
The dome is tiled on the exterior.
2 . calm/cool etc exterior behaviour that seems calm, unfriendly etc but which often hides a different feeling or attitude:
Beneath that calm exterior, he has a fierce will to win.
II. exterior 2 BrE AmE adjective [usually before noun]
[ Date: 1500-1600 ; Language: Latin ; Origin: 'more outward' , from exter ; ⇨ ↑ external ]
1 . on the outside of something OPP interior :
The exterior walls need a new coat of paint.
2 . exterior scenes in a film are filmed outdoors
3 . coming from or relating to facts, situations etc other than the one you are considering:
information that is exterior to the text itself