Meaning of “per” - Learner’s Dictionary

per

preposition us uk strong /pɜːr/ weak /r/

A2 for each:

Our hotel room costs $60 per night.
The speed limit is 100 kilometres per hour.
The wedding dinner will cost £30 per head (= for each person).

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(Definition of “per” from the Cambridge Learner’s Dictionary © Cambridge University Press)