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English definition of “per annum”

per annum

adverb     (written abbreviation p.a.) formal
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 adverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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