Swarm
/swˈɔrm/
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Definition
(noun) A large number of insects, especially when in motion or (for bees) migrating to a new colony.
Sentence Examples
A swarm of mosquitoes followed him.
A swarm of bees attacked us without mercy.
CEFR Practice Quiz
A huge ____ of bees was flying around the tall tree in the middle of our garden this afternoon today.