adj. External; outward; pertaining to that which is external. The outside surface of any structure.; - opposed to interior; as, the exterior part of a sphere. External; on the outside; without the limits of; extrinsic; as, an object exterior to a man, opposed to what is within, or in his mind. Relating to foreign nations; foreign; as, the exterior relations of a state or kingdom.
- Exterior angle (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.
- Exterior side (Fort.), the side of the polygon upon which a front of fortification is formed.
- n. The outward surface or part of a thing; that which is external; outside. Outward or external deportment, form, or ceremony; visible act; as, the exteriors of religion.