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# acuity

noun (acuity — usually uncountable)

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

## Everyday

1. (formal) Sharpness of a sense, especially of eyesight or hearing: «visual acuity» means how clearly you can see small details. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#m1)
2. (formal) Sharpness of the mind: being quick to notice and understand things. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#m2)

### In the lessons

In science and health lessons, eye tests measure visual acuity with a chart of letters getting smaller. Doctors say «20/20» (US) or «6/6» (UK) for normal acuity. In stories it describes a detective's sharp mind. Phrases: «visual acuity», «mental acuity».

### Examples

- The eye test measured my visual acuity. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x1)
- Eagles have amazing visual acuity and can spot a mouse from high up. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x2)
- The detective's acuity helped her solve the case. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x3)
- Older dogs can lose some hearing acuity. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x4)
- The optician said my acuity is better with glasses. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x5)
- Owls have great acuity in the dark. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x6)

### Note

Formal word; everyday words are «sharpness», «how well you see». Say «uh-KYOO-it-ee». Related: «acute» (sharp; also an acute angle, less than 90 degrees). Not «accuracy», though they are related in meaning.

## On Mova

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