Ex·te·ri·or, a.
 1. External; outward; pertaining to that which is external; -- opposed to interior; as, the exterior part of a sphere.
 Sith nor the exterior nor the inward man
 Resemble that it was.   --Shak.
 2. 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.
    Without exterior help sustained.   --Milton.
 3. 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.
 Note: See Illust. of Ravelin.
 exterior angle
      n : the supplement of an interior angle of a polygon [syn: external
          angle]