Definition of swarm
1 a
: a great number of honeybees emigrating together from a hive in company with a queen to start a new colony elsewhere
b
: a colony of honeybees settled in a hive
2 a
: a large number of animate or inanimate things massed together and usually in motion : throng
- swarms of sightseers
- a swarm of locusts
- a swarm of meteors
b
: a number of similar geological features or phenomena close together in space or time
- a swarm of dikes
- an earthquake swarm
