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English definition of “per”

per

preposition uk   strong /pɜːr/ us    /pɝː/ weak /r/  //
A2 used when expressing rates, prices, or measurements to mean 'for each': The meal will cost $20 per person. The car was travelling at 70 miles per hour (70 mph). There are more cafés per square mile here than anywhere else in the country.
See also
Both, all, each and every
(Definition of per from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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