![metal detector metal detector](https://www.tekportal.net/wp-content/uploads/2018/12/metal-detector.jpg)
noun
- an electronic device for detecting the presence of metal objects, as one used as a portable sweeping unit or one emplaced in an archway at an airport terminal to detect concealed weapons, explosives, etc.
noun
- a device that gives an audible or visual signal when its search head comes close to a metallic object embedded in food, buried in the ground, etc