extĕrĭor, us, v. exter, II.
exterior us, adj.comp.exter, outward, outer, exterior : vallus, Cs.: contra exteriorem hostem, Cs....
An Elementary Latin Dictionary
·noun The outward surface or part of a thing; that which is external; outside. II. Exterior ·adj Re...
Webster's Dictionary of the English Language
The side of an imaginary polygon, upon which the plan of a fortification is constructed. ...
The Sailor's Word-Book
In fortification, that slope of a work towards the country which is next outward beyond its superior...