Military. a fortified structure with ports or loopholes through which defenders may direct gunfire.
Also called garrison house. (formerly) a building, usually of hewn timber and with a projecting upper story, having loopholes for musketry.
a house built of squared logs.
Rocketry. a structure near a launching site for rockets, generally made of heavily reinforced concrete, for housing and protecting personnel, electronic controls, and auxiliary apparatus before and during launching operations.
Contemporary Examples

The Story of the American Journalists Who Landed on D-Day Timothy M. Gay June 5, 2012
The Story of the American Journalists Who Landed on D-Day Timothy M. Gay June 5, 2012

Historical Examples

From Bapaume to Passchendaele, 1917 Philip Gibbs
The Discovery of America Vol. 1 (of 2) John Fiske.
Three Years’ War Christiaan Rudolf de Wet
The Colonial Architecture of Philadelphia Frank Cousins
The New Nation Frederic L. Paxson
The Story of the Great War, Volume VI (of VIII) Various
The Pathfinder James Fenimore Cooper
Ox-Team Days on the Oregon Trail Ezra Meeker

(formerly) a wooden fortification with ports or loopholes for defensive fire, observation, etc
a concrete structure strengthened to give protection against enemy fire, with apertures to allow defensive gunfire
a building constructed of logs or squared timber
a reinforced concrete building close to a rocket-launching site for protecting personnel and equipment during launching


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