Definition of bastion
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Bastion (n.) A work projecting outward from the main inclosure of a fortification, consisting of two faces and two flanks, and so constructed that it is able to defend by a flanking fire the adjacent curtain, or wall which extends from one bastion to another. Two adjacent bastions are connected by the curtain, which joins the flank of one with the adjacent flank of the other. The distance between the flanks of a bastion is called the gorge. A lunette is a detached bastion. See Ravelin..
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Base ::
Base (n.) The exterior side of the polygon, or that imaginary line which connects the salient angles of two adjacent bastions..
Bastion ::
Bastion (n.) A work projecting outward from the main inclosure of a fortification, consisting of two faces and two flanks, and so constructed that it is able to defend by a flanking fire the adjacent curtain, or wall which extends from one bastion to another. Two adjacent bastions are connected by the curtain, which joins the flank of one with the adjacent flank of the other. The distance between the flanks of a bastion is called the gorge. A lunette is a detached bastion. See Ravelin..
Capital ::
Capital (a.) An imaginary line dividing a bastion, ravelin, or other work, into two equal parts..
Orillon ::
Orillon (n.) A semicircular projection made at the shoulder of a bastion for the purpose of covering the retired flank, -- found in old fortresses..
Counterguard ::
Counterguard (n.) A low outwork before a bastion or ravelin, consisting of two lines of rampart parallel to the faces of the bastion, and protecting them from a breaching fire..
Demigorge ::
Demigorge (n.) Half the gorge, or entrance into a bastion, taken from the angle of the flank to the center of the bastion..
Flank ::
Flank (n.) That part of a bastion which reaches from the curtain to the face, and defends the curtain, the flank and face of the opposite bastion; any part of a work defending another by a fire along the outside of its parapet..
Demilune ::
Demilune (n.) A work constructed beyond the main ditch of a fortress, and in front of the curtain between two bastions, intended to defend the curtain; a ravelin. See Ravelin..
Surfaced ::
Surface (n.) That part of the side which is terminated by the flank prolonged, and the angle of the nearest bastion..
Cavalier ::
Cavalier (n.) A work of more than ordinary height, rising from the level ground of a bastion, etc., and overlooking surrounding parts..
Gorge ::
Gorge (n.) The entrance into a bastion or other outwork of a fort; -- usually synonymous with rear. See Illust. of Bastion.
Lunette ::
Lunette (n.) A fieldwork consisting of two faces, forming a salient angle, and two parallel flanks. See Bastion..
Epaule ::
Epaule (n.) The shoulder of a bastion, or the place where its face and flank meet and form the angle, called the angle of the shoulder..
Retirade ::
Retirade (n.) A kind of retrenchment, as in the body of a bastion, which may be disputed inch by inch after the defenses are dismantled. It usually consists of two faces which make a reentering angle..
Tenaillon ::
Tenaillon (n.) A work constructed on each side of the ravelins, to increase their strength, procure additional ground beyond the ditch, or cover the shoulders of the bastions..
Crownwork ::
Crownwork (n.) A work consisting of two or more bastioned fronts, with their outworks, covering an enceinte, a bridgehead, etc., and connected by wings with the main work or the river bank..
Demibastion ::
Demibastion (n.) A half bastion, or that part of a bastion consisting of one face and one flank..
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