■ noun
1》 a large or dense group of flying insects.
↘a large number of honeybees that leave a hive with a queen in order to establish a new colony.
2》 a large group of people or things.
■ verb
1》 move in or form a ~.
2》 move somewhere in large numbers.
↘( ~ with ) be crowded or overrun with.
3》 ( ~ up ) climb rapidly by gripping with one's hands and feet.
Derivatives
~er noun
Origin
OE swearm , of Gmc origin.