- a fortified structure with ports or loopholes through which defenders may direct gunfire.
- (formerly) a building, usually of hewn timber and with a projecting upper story, having loopholes for musketry.
- a house built of squared logs.
- 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.
- a firm that specializes in block trades.
- (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
