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.
A hindrance or obstacle, as in His lack of a degree is a real stumbling block to his advancement. This term originally meant a tree stump over which one trips.. Its figurative use dates from the early 1500s. See also: block, stumble.