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blockhouse

[blok-hous]
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noun, plural block·hous·es [blok-hou-ziz] /ˈblɒkˌhaʊ zɪz/.
  1. Military. a fortified structure with ports or loopholes through which defenders may direct gunfire.
  2. Also called garrison house. (formerly) a building, usually of hewn timber and with a projecting upper story, having loopholes for musketry.
  3. a house built of squared logs.
  4. 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.

Origin of blockhouse

1505–15; < Middle Dutch blochuus, equivalent to bloc block + huus house
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for blockhouse

blockhouse

noun
  1. (formerly) a wooden fortification with ports or loopholes for defensive fire, observation, etc
  2. a concrete structure strengthened to give protection against enemy fire, with apertures to allow defensive gunfire
  3. a building constructed of logs or squared timber
  4. a reinforced concrete building close to a rocket-launching site for protecting personnel and equipment during launching
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for blockhouse

n.

c.1500, of uncertain origin (see blockade (n.)). Also in 16c. French, Dutch, German.

Online Etymology Dictionary, © 2010 Douglas Harper