public address system
- noun a microphone, amplifier and loudspeaker set up to allow one person to be heard by a group of people
- (written as public-address system)A system, such as that utilized in airports or shopping centers, which serves convey voice messages through a distributed group of speakers powered by one or more amplifiers. Its abbreviation is PA system.
Information & Library Science
- noun a system of loudspeakers, by which messages can be given to the public in e.g. a supermarket, exhibition centre or airport.