Ex‐te″ri‐or, a. [L. exterior, compar. of exter or exterus on the outside, outward, foreign, strange, a compar. fr. ex: cf. F. extérieur. See Ex�, and cf. Extreme, Interior.] 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. Wilhelm.
See Illust. of Ravelin.