<p><strong>Noun:</strong></p><ul><li>plural: blockhouses</li><li>Military: a fortified structure with ports or loopholes through which defenders may direct gunfire</li><li>Also called garrison house</li><li>(formerly) a building, usually of hewn timber and with a projecting upper story, having loopholes for musketry</li><li>a house built of squared logs</li><li>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</li></ul>