accuracy

B1 Topic:Describing Qualities

US /ˈæk.jɚ.ə.si/ UK /ˈak.jʊ.ɹə.si/ See IPA manual

Freq #13337

Meanings

1

noun
The quality of being correct and free from mistakes.

I began to doubt the accuracy of my compass.
2

noun
How closely a measurement matches the true value.

The atomic clock measures time with great accuracy.

Thesaurus

Synonyms

1 noun · the quality of being... truth exactness correctness

More nicety truthfulness

Opposites

inaccuracy

Word family

Forms accuracies

Derived forms high-accuracyhyperaccuracyoveraccuracy

Related forms exactness fidelity integrity precision

Etymology

* First attested in the 1660s. * accurate + -cy

Topics

Describing Qualities

External links

# accuracy

**Type:** Word
**Level:** B1
**Part of speech:** noun
**IPA (US):** /ˈæk.jɚ.ə.si/
**IPA (UK):** /ˈak.jʊ.ɹə.si/
**Frequency rank:** 13337

## Meanings
1. The quality of being correct and free from mistakes.
2. How closely a measurement matches the true value.

## Examples
- I began to doubt the accuracy of my compass.
- The atomic clock measures time with great accuracy.

## Synonyms
- correctness
- nicety
- truthfulness

## Antonyms
- inaccuracy

## Derived Forms
- high-accuracy
- hyperaccuracy
- overaccuracy

## Related Forms
- exactness
- fidelity
- integrity
- precision

## Roots and Affixes
- Affix: -cy - state

## Etymology
* First attested in the 1660s. * accurate + -cy

## AI Etymology
Accuracy is first attested in the 1660s. Morphologically, it is accurate plus -cy. The abstract suffix turns the base into a noun for a quality, condition, or measurable property, which keeps the modern meanings close to the adjective behind it. In use as a noun, accuracy denotes the quality of being correct and free from mistakes and how closely a measurement matches the true value. The same word family continues in derived forms such as high-accuracy, hyperaccuracy, and overaccuracy and related entries such as exactness, fidelity, integrity, and precision.

## Topics
- Describing Qualities

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