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# acuity

«acuity» in Mova's school dictionary: **Sharpness of a sense, especially of eyesight or hearing:…** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

noun (acuity — usually uncountable)

### meaning for a pupil

1) (formal) Sharpness of a sense, especially of eyesight or hearing: «visual acuity» means how clearly you can see small details. [tree →](https://md.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://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#m2)

### sense 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://md.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://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x2)
- The detective's acuity helped her solve the case. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x3)
- Older dogs can lose some hearing acuity. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x4)
- The optician said my acuity is better with glasses. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/acuity/#x5)
- Owls have great acuity in the dark. [tree →](https://md.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.

### Trees and pragmatics

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