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# alertness

noun (alertness — uncountable)

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

## Everyday

Alertness is being awake, watchful and ready to notice and react quickly. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/alertness/#m1)

### In the lessons

In safety and health it matters for crossing roads, driving and learning; sleep and breakfast help alertness. In science it is linked to the brain and caffeine. Phrases: mental alertness, stay alert, increase alertness.

### Examples

- Sleep helps your alertness in class. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/alertness/#x1)
- The guard's alertness stopped the thief. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/alertness/#x2)
- Drivers need full alertness. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/alertness/#x3)
- Too much screen time at night lowers alertness the next day. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/alertness/#x4)
- Dogs show alertness when they prick up their ears. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/alertness/#x5)
- Coffee can increase alertness in adults. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/alertness/#x6)

### Note

Uncountable. From alert + -ness. Related: alert (adjective, noun, verb). Children should not use energy drinks to boost alertness.

## On Mova

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