exterior

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Outer; external.
• adjective Originating or acting from the outside.
• adjective Suitable for use outside.
• noun A part or a surface that is outside.
• noun An external or outward appearance.
• noun A representation in visual art of the outdoors.

from The Century Dictionary.

• Situated or being outside; pertaining to or connected with that which is outside; outward; outlying; external: as, the exterior relations or possessions of a country; an exterior boundary or line of fortification.
• Related to or connected with the outside; acting or originating from without; outwardly manifested or perceived; not intrinsic.
• Consisting of or constituting the outer or visible part; outwardly observable; external; manifest.
• Being on the outer side or outer part; of or pertaining to the outer surface, or to that surface as viewed from the outside: as, the exterior decorations of a church.
• In botany, on the side away from the axis: same as anterior.
• noun The outer surface or aspect; the outside; the external features: as, the exterior of a building; we can seldom judge a man by his exterior.
• noun Outward or visible deportment, form, or ceremony; visible act: as, the exteriors of religion.

from the GNU version of the Collaborative International Dictionary of English.

• noun The outward surface or part of a thing; that which is external; outside.
• noun Outward or external deportment, form, or ceremony; visible act.
• adjective External; outward; pertaining to that which is external; -- opposed to interior.
• adjective External; on the outside; without the limits of; extrinsic.
• adjective Relating to foreign nations; foreign.
• adjective (Geom.) the angle included between any side of a triangle or polygon and the prolongation of the adjacent side; also, an angle included between a line crossing two parallel lines and either of the latter on the outside.
• adjective (Fort.) the side of the polygon upon which a front of fortification is formed.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Relating to the outside parts or surface of something.
• adjective Being from outside a country; foreign.
• adjective Outdoors.
• noun The outside part, parts or surface of something.
• noun Foreign lands.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the region that is outside of something
• noun the outer side or surface of something
• adjective situated in or suitable for the outdoors or outside of a building