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English definition of “roost”

roost

noun [C] uk   /ruːst/ us  
a place, such as a branch of a tree, where birds rest or sleep

roost

verb [I] uk   /ruːst/ us  
When birds roost, they go somewhere to rest or sleep.
(Definition of roost from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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