Definition of swarms:
(n) :
A large number of insects, especially when in motion or (for bees) migrating to a new colony.
(n) :
A mass of people, animals or things in motion or turmoil.
(v) :
(intransitive) To teem, or be overrun with insects, people, etc.
(v) :
(intransitive) To move as a swarm.
(v) :
(transitive) To fill a place as a swarm.
(v) :
(transitive) To overwhelm as by an opposing army.