Stock Exchange.a firm that specializes in block trades.
Pronunciation: (blok'hous"),[key] —n., —pl.-hous•esPronunciation: (hou"ziz).[key] 1. Mil.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.