pa system

noun

1. public-address system.

noun

1. a combination of electronic devices that makes sound audible via loudspeakers to many people, as in an auditorium or out of doors.

noun

1. See public-address system

noun

1. a system of one or more microphones, amplifiers, and loudspeakers for increasing the sound level of speech or music, used in auditoriums, public gatherings, etcSometimes shortened to: PA system