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English definition of “PA”

PA

noun [C]    
WORKPLACE abbreviation for personal assistant : someone whose job is helping someone in a higher position , especially by writing letters , arranging meetings , and making phone calls : PA to sb She is PA to the director of the organization .
COMMUNICATIONS abbreviation for public address system : a system used to make announcements or play music in public places
(Definition of PA noun from the Cambridge Business English Dictionary © Cambridge University Press)
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