public address system

Từ điển Oxford Learners Wordfinder Dictionary

noun

an electronic amplification system used as a communication system in public areas
• Syn:
P.A. system, PA system, P.A., PA
• Hypernyms:
communication system
• Part Meronyms:
amplifier, loudspeaker, speaker, speaker unit, loudspeaker system,
speaker system, tannoy