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.

Exterior
(Ex*te"ri*or), n.

1. The outward surface or part of a thing; that which is external; outside.

2. Outward or external deportment, form, or ceremony; visible act; as, the exteriors of religion.

Exteriority
(Ex*te`ri*or"i*ty) n. [Cf. F. extériorité.] Surface; superficies; externality.

Exteriorly
(Ex*te"ri*or*ly) adv. Outwardly; externally; on the exterior. Shak.

They are exteriorly lifelike.
J. H. Morse.

Exterminate
(Ex*ter"mi*nate) v. t. [imp. & p. p. Exterminated; p. pr. & vb. n. Exterminating] [L. exterminatus, p. p. of exterminare to abolish, destroy, drive out or away; ex out + terminus boundary, limit. See Term.]

1. To drive out or away; to expel.

They deposed, exterminated, and deprived him of communion.
Barrow.

2. To destroy utterly; to cut off; to extirpate; to annihilate; to root out; as, to exterminate a colony, a tribe, or a nation; to exterminate error or vice.

To explode and exterminate rank atheism.
Bentley.

3. (Math.) To eliminate, as unknown quantities. [R.]

Extermination
(Ex*ter`mi*na"tion) n. [Cf. F. extermination.]

1. The act of exterminating; total destruction; eradication; excision; as, the extermination of inhabitants or tribes, of error or vice, or of weeds from a field.

2. (Math.) Elimination. [R.]

Exterminator
(Ex*ter"mi*na`tor) n. [L.] One who, or that which, exterminates. Buckle.

Exterminatory
(Ex*ter"mi*na*to*ry) a. Of or pertaining to extermination; tending to exterminate. "Exterminatory war." Burke.

Extermine
(Ex*ter"mine) v. t. [F. exterminer.] To exterminate; to destroy. [Obs.] Shak.

Extern
(Ex*tern") a. [Cf. F. externe. See External.] External; outward; not inherent. [Obs.] 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.

  By PanEris using Melati.

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