noun
- a device that discovers or identifies the presence of something
Examples
- The smoke detector started beeping when the battery was low.
- Airport security uses metal detectors to screen passengers.
- The lie detector test showed inconclusive results.
- Scientists used a radiation detector to measure contamination levels.
- The motion detector turned on the lights automatically.
- Carbon monoxide detectors can save lives by warning of dangerous gas levels.
- The treasure hunter swept the beach with his metal detector.