Almost all of the asteroids in our solar system are orbiting in a broad band 19,400,000 miles wide between Jupiter and Mars.
Blockage, clogging, or impeded flow, for example, by occlusion or stenosis. obstruction. 1. the act of blocking or clogging. obstruction. 1 something that blocks or clogs. 2 the act of blocking or preventing passage. 3 the condition of being obstructed or clogged. obstruct, v., obstructive, adj.
block trade. Definition. A large amount of securities being traded, typically at least 10,000 shares of stock or $200,000 in bonds. Normally, only institutional investors undertake such large trades. Block trades can affect the market price of the security, depending on the liquidity of the market. block house.