1. a device that emits a ping or beeping sound, especially for location or signaling purposes
Usage: technical
2. a sonar device that sends out acoustic pulses
Usage: nautical; technical

Examples

• The search team used a pinger to locate the missing equipment underwater.
• Each life jacket was equipped with a small pinger for emergency situations.
• The submarine’s pinger helped it navigate in murky waters.
• Rescue workers activated the pinger to signal their location.
• The oceanographer deployed a pinger to map the seafloor.
• The aircraft’s emergency pinger transmitted its position after the crash.