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# siren

«siren» in Mova's school dictionary: **A device that makes a loud wailing or rising-and-falling…** — its meaning for a pupil, its sense in the lessons and examples, with 4 sentences of Mova's corpora that use it.

### part of speech

noun (a siren, sirens)

### meaning for a pupil

1) A device that makes a loud wailing or rising-and-falling sound to warn people, used on ambulances, fire engines and police cars, and for warnings about danger. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#m1)

2) In Greek myths, the Sirens were creatures whose beautiful singing lured sailors onto rocks. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#m2)

### sense in the lessons

In road safety, when you hear a siren, look around: an emergency vehicle is coming; stay on the pavement and let it pass. Drivers pull over to let it through. Some places have sirens to warn of floods, storms, tornadoes or fires; at school, a siren or alarm means follow the drill. In science, the Doppler effect is why a siren sounds higher as it comes towards you and lower as it goes away. In stories, a siren is a dangerous, tempting singer. Phrases: "hear a siren", "sirens wailing", "a police siren", "tornado siren", "air-raid siren".

### examples

- We heard a siren and the ambulance raced past. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x1)
- When you hear a siren, stay on the pavement. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x2)
- Cars pulled over for the fire engine with its siren on. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x3)
- The tornado siren sounded across the town. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x4)
- The siren got lower in pitch as the police car drove away. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x5)
- In the myth, the Sirens sang to the sailors. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x6)
- The siren woke the baby. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x7)
- At night we could hear sirens in the city. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/#x8)

### note

Countable: a siren, sirens. Spelling: s-i-r-e-n. Emergency numbers: 911 (USA, Canada), 999 (UK, Ireland also 112), 000 (Australia), 111 (New Zealand). A siren is a warning, so take it seriously.

### In the corpora

- [A siren and flashing blue lights mean police are rushing to an emergency, and other drivers must pull over to let them through.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/30-police-courts-and-prison/5/)
- [A siren means an emergency vehicle, such as an ambulance, a fire engine or a police car, is coming.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/12-sounds-that-warn/6/)
- [When you hear a siren near a road, stay on the pavement or sidewalk and wait until the vehicle has passed.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/12-sounds-that-warn/7/)
- [He does not wait for a siren; he runs with his family up the hill behind the town.](https://md.mova.elamur.ai/free/en/corpora/school/everyday/326-rainbows-beach-quakes-lambs-berries-cacti-and-ants/5/)

### Trees and pragmatics

[Every meaning and example of «siren» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/S/siren/), each sentence with its dependency tree and frames.