I. ek-ˈstir-ē-ər adjective
Etymology: Latin, comparative of exter, exterus being on the outside, foreign, from ex
Date: 1528
1. : being on an outside surface : situated on the outside
2. : observable by outward signs
his exterior quietness is belied by an occasional nervous twitch — Current Biography
3. : suitable for use on outside surfaces
• ex·te·ri·or·ly adverb
II. noun
Date: 1591
1.
a. : an exterior part or surface : outside
b. : outward manner or appearance
2. : a representation (as on stage or film) of an outdoor scene ; also : a scene filmed outdoors