Bastion

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bastion

[′bas·chən]
(geology)
A prominent aggregation of bedrock extending from the mouth of a hanging glacial trough and reaching well into the main glacial valley.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Bastion

A projecting portion of a fortification designed to defend the adjacent curtain wall; it typically approximates a semi-hexagon, with the two outer faces meeting at an acute angle, and two flanks abutting a curtain wall on each side.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Bastion

 

a pentagonal fortification erected at the corners of the fortress wall to fire at the area in front of or along the fortress wall or the moats in front of them. Bastions appeared for the first time in Italy at the end of the 15th century and in Russia in the 16th century, where they were called raskats until the 18th century. A fortress bastion in Russia and in other countries consisted of one or two earth ramparts for the placement of weapons: the first, or the main rampart, and the second, or cavalier, which was higher than the first. The front sides of the bastion were called faces; the sides, flanks; and the inner rear side was called the gorge. The parts of two neighboring bastions facing each other and the section of the barrier connecting them, called the curtain, formed the bastion front.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

bastion

A defense work, round, rectangular, or polygonal in plan, projecting from the outer wall of a fortification, principally to defend the adjacent perimeter.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The reporter said that after liberating al-Shajara town, army unit continued operations on the axis of the villages of Beit Ara, Ma'aryia and al-Qasir, the last bastion of the terrorist organization in al-Yarmouk basin.
Besides the bastions and towers, an ammunition depot, water reservoir, the harem, probably for Mir(s), a prison, a place for holding court and cells for accommodation of guards and sepoys are also part of the fort.
He said the fort's walls are 10 to 15 feet wide and are made of mud bricks, strengthened with bastions.
"What I focused on is the 11 bastions of Nicosia which create one city, regardless of whether there's a divide or not," Melissa clarifies.
MULTAN -- The Punjab Archaeology Department has invited bids from its registered contractors for conservation of a damaged part of boundary wall and a bastion of historical Derawar fort located on the edge of Cholistan desert in Bahawalpur.
Official sources said the damage caused by rains and ageing process to three bastions and two segments of fort's 80 feet high boundary wall that is around eight to nine feet thick was reported some time ago and government recently approved the proposal and released funds.
drones carried out two air strikes on bastions and checkpoints of al-Qaida militants in the insurgents-controlled town of Azzan in Shabwa province, killing at least 10 terrorists, the local security official said on condition of anonymity.
The conquest of this male bastion can take place only in an all-female environment (Stephen Moore does have a point here).
On the city walls, the bastions have become the popular rendezvous for lovers and local people refer to them as 'stone beds'.