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# detector

noun (detector, detectors)

«detector» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

A detector is a machine or device that notices or finds something, such as smoke, metal or movement. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#m1)

### In the lessons

In safety lessons, smoke detectors (smoke alarms) warn us of fire; test them regularly. In science, detectors measure things like light or heat. In everyday life: metal detectors at airports, carbon monoxide detectors at home. Phrases: «smoke detector», «metal detector», «motion detector», «lie detector».

### Examples

- The smoke detector beeped when the toast burned. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#x1)
- We found an old coin with a metal detector. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#x2)
- Every home should have a working smoke detector. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#x3)
- The motion detector switches on the garden light. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#x4)
- At the airport we walked through a metal detector. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#x5)
- Change the battery when the detector starts chirping. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#x6)
- A carbon monoxide detector can save lives. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/#x7)

### Note

From the verb «detect» (to notice or discover). Safety: a beeping or chirping detector means smoke or a low battery — tell an adult, never take out the battery to stop the noise. Countable: «a detector», «detectors».

## On Mova

- [Trees and pragmatics of «detector» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/D/detector/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«detector» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/detector.html) on Mova free.