accuracy
AK-yuh-ruh-see
/ˈækjʊrəsi/
The degree to which the result of a measurement, calculation, or specification conforms to the correct value or a standard.
Accuracy is about hitting the actual target (the bullseye), whereas precision is about hitting the same spot repeatedly.
The story behind the word. Derived from 'accurare' (to take care of), from 'ad-' (to) + 'cura' (care). It literally means 'done with care'—because hitting the target requires careful attention.
Word relationships
- correctness: Correctness is binary (right or wrong), while accuracy is a matter of degree (how close to the truth).
- inaccuracy: The quality of being incorrect or distant from the true value.
Commonly confused with
- precision: Accuracy is closeness to the true value; precision is the repeatability of the measurement.
Word family
- accurate (adjective): Correct in all details; exact.
- accurately (adverb): In an accurate manner; exactly.
Collocations
- high accuracy
- degree of accuracy
- ensure accuracy
- historical accuracy
Example sentences
- "The GPS system was praised for its high accuracy, locating the vehicle within a few inches." Tech review article
Memory hook
Think of an accurate archer who takes great care (cura) to aim directly at the center of the target. Hitting the bullseye with care.
When not to use
Do not confuse with precision in technical writing.
Fun facts
- The word 'cure' and 'curator' share the same Latin root 'cura' (care) with 'accuracy'.
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