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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.
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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

Related Words for blockhouse

shelter, fortification, dugout, bastion, fortress, barricade, reinforcement, citadel, blockhouse, camp, station, fastness, castle, garrison, acropolis, redoubt, stronghold, manor, keep, fort

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Historical Examples of blockhouse

British Dictionary definitions for blockhouse


  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
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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


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

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Online Etymology Dictionary, © 2010 Douglas Harper