1. devices that emit pinging sounds, especially sonar equipment or electronic devices that make beeping noises
Usage: technical; informal
2. table tennis balls
Usage: informal; British

Examples

• The submarine’s pingers helped locate the wreckage on the ocean floor.
• Scientists attached pingers to the whales to track their migration patterns.
• The electronic pingers in the warehouse alert workers when inventory is low.
• We need new pingers for the ping-pong table in the break room.
• The search team used underwater pingers to map the seafloor.
• His phone’s pingers kept going off during the meeting.