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English definition of “per annum”

per annum

adverb uk   (written abbreviation p.a.) formal us  
used in business when referring to an amount that is produced, sold, or spent each year: The country exports goods worth $600 million per annum.Relating to regular periods of timeForms of money and methods of payment
(Definition of per annum from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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