- any large number of meteoroids moving in parallel paths.
Compare meteor shower.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for meteor swarm
The thing that had registered as a larger lump in a meteor-swarm was not a meteor at all.The Aliens
He cut speed and eased the Sunsprite down into that thinner area of the meteor-swarm.
By the time an hour had passed, the Falcon had groped out through the periodic break in the meteor-swarm around the asteroid.