Meaning of “swarm” in the English Dictionary

"swarm" in British English

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uk /swɔːm/ us /swɔːrm/

[ C ] a large group of insects all moving together:

a swarm of bees/wasps/ants/locusts
The dead sheep was covered with swarms of flies.

[ C, + sing/pl verb ] a large group of people all moving together:

A swarm of/Swarms of photographers followed the star's car.

swarmverb [ I ]

uk /swɔːm/ us /swɔːrm/

When insects swarm, they come together in a large group.

When people swarm somewhere, they move there in a large group or in large numbers:

During the summer, tourists swarm the little beachside town.

Phrasal verb(s)

(Definition of “swarm” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"swarm" in American English

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swarmnoun [ C ]

us /swɔrm/

a large group of insects, esp. bees, or any large, busy group:

Swarms of reporters descended on the little town.

to move in a large group:

In summer, mosquitoes swarm around that pond.
The playground swarmed with little kids.

(Definition of “swarm” from the Cambridge Academic Content Dictionary © Cambridge University Press)