1. A portable electronic device with a built-in microphone and speaker used to amplify and project the voice over a distance.
Usage: Also called a megaphone or bullhorn in American English.; Commonly used by police, emergency responders, and event organizers.

Examples

• The police officer used a loudhailer to address the crowd during the protest.
• The lifeguard grabbed the loudhailer to warn swimmers about the dangerous currents.
• The event coordinator spoke through a loudhailer to announce the start of the concert.
• During the emergency evacuation, firefighters used loudhailers to direct people to safety.
• The coach used a loudhailer to give instructions to the team from across the field.