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English definition of “PA”

PA

noun [C usually singular] (SOUND EQUIPMENT)    /ˌpiːˈeɪ/ (also PA system)
abbreviation for public address system (= equipment for making sound, especially someone's voice, louder in a public place): They've just announced on the PA that our flight's been delayed.Amplifiers, microphones and speakers
(Definition of PA noun (SOUND EQUIPMENT) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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