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1. A military fortification constructed of sturdy material, such as concrete, and designed with ports for defensive firing or observation.
2. A heavily reinforced building used for launch operations of missiles and space launch vehicles.
3. A fort made of squared timbers with a projecting upper story.


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



n., pl. -hous•es (ˌhaʊ zɪz)
1. a building of hewn timbers, usu. with a projecting upper story, having loopholes for musketry: formerly used as a fort.
2. a defensive military structure, as of concrete, used for observation and directing gunfire.
3. a concrete structure for housing and protecting personnel and controls during rocket launchings.
[1505–15; < Middle Dutch blochuus]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.blockhouse - a stronghold that is reinforced for protection from enemy fireblockhouse - a stronghold that is reinforced for protection from enemy fire; with apertures for defensive fire
stronghold, fastness - a strongly fortified defensive structure
centre de lancement


[ˈblɒkhaʊs] N (blockhouses (pl)) [ˈblɒkhaʊzɪz]blocao m
References in classic literature ?
I was taken once by the French, and they put sixty-two of us in a block-house, nigh hand to old Frontinac; but ‘twas easy to cut through a pine log to them that was used to timber.
In the center of a plain stood a log fort, with a block-house at each of its four corners.
Shops had been turned into metal shuttered block-houses, windows smashed and teenage gangs kept shoppers away.

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