Definitions

1. noun

A device that detects or measures a physical property, such as temperature, light, or sound, and sends a signal to a control unit to respond to the detected condition.

“The smoke sensor triggered the fire alarm when it detected rising levels of smoke in the building.”

2. verb

To detect or perceive something, especially through the use of a device.

“The radar system sensed the presence of the incoming aircraft, alerting air traffic control to take action.”