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# concussion

noun (concussion — usually uncountable; a concussion, concussions)

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

## Everyday

1. Concussion is a brain injury caused by a hard knock to the head. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#m1)
2. A person with concussion may feel dizzy, sick, confused or sleepy, or have a headache. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#m2)

### In the lessons

In safety and PE lessons, concussion is why we wear helmets for cycling, skating and some sports. In sport, a player who hits their head must stop playing and be checked by an adult or doctor («If in doubt, sit them out»). In stories a character may be knocked out and wake with concussion. Phrases: «have concussion», «get a concussion», «signs of concussion», «concussion check».

### Examples

- He got concussion when he fell off his bike. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x1)
- A helmet can help prevent concussion. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x2)
- Tell an adult if you hit your head and feel dizzy. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x3)
- The player came off the pitch with a possible concussion. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x4)
- Signs of concussion include headache and feeling sick. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x5)
- After her concussion she had to rest for a week. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x6)
- The coach checked him for concussion. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x7)
- Concussion can happen even without being knocked out. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/concussion/#x8)

### Note

UK often «have concussion»; US «have a concussion». Myth: you must be knocked out to have concussion — not true. Safety: after any head knock, stop playing, tell an adult, and get medical help if you vomit, feel very sleepy or confused.

## On Mova

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