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English definition of “whirr”

whirr

verb [I] uk mainly UK (US usually whir (-rr-))   /wɜːr/ us    /wɝː/
(especially of machines) to make a low, soft, continuous sound: I could hear the washing machine whirring in the kitchen.
whirr
noun [C usually singular] uk (mainly US whir)   us  
the whirr of machinery
(Definition of whirr from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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