ac·​cu·​ra·​cy | \ ˈa-kyə-rə-sē How to pronounce accuracy (audio) , ˈa-k(ə-)rə-\
plural accuracies

Definition of accuracy

1 : freedom from mistake or error : correctness checked the novel for historical accuracy
2a : conformity to truth or to a standard or model : exactness impossible to determine with accuracy the number of casualties
b : degree of conformity of a measure to a standard or a true value — compare precision entry 1 sense 2a

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Examples of accuracy in a Sentence

Each experiment is performed twice to ensure accuracy. The police questioned the accuracy of his statement. He could not say with any accuracy what he had seen. Several managers have tried to increase the speed and accuracy of the workers.
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Recent Examples on the Web

Some critics have questioned the accuracy of the numbers but city staff said the estimates have been peer-reviewed twice. Rob Nikolewski, San Diego Union-Tribune, "Community choice energy across San Diego on the cusp of becoming reality," 16 Sep. 2019 After providing the system with an initial dataset, the human moderators are sent a stream of videos that have been flagged by YouTube’s detection systems as potentially violating those rules and asked to confirm or deny the accuracy of the flag. Wired, "YouTube Removes More Videos, but Still Misses a Lot of Hate," 4 Sep. 2019 Adding to meteorologists’ woes are the many amateurs tracking the storm on their own and challenging the accuracy of expert forecasters. Patricia Mazzei,, "A wobbly Hurricane Dorian makes forecasters’ job nearly impossible," 31 Aug. 2019 Adding to meteorologists’ woes are the many amateurs tracking the storm on their own and challenging the accuracy of expert forecasters. New York Times, "For Forecasters, Hurricane Dorian Has Already Been a Handful," 31 Aug. 2019 Machine learning can now get much better results, rivaling the accuracy of human doctors. Tom Simonite, WIRED, "Ask the Know-It-Alls: How Do Machines Learn?," 26 Aug. 2019 The accuracy of videos that supposedly show antifa activists attacking right-wing protesters has also come into question., "Fox News hosts contradict news reports and Ted Wheeler, claim Portland protests showed ‘antifa out of control’," 20 Aug. 2019 But Ravenel alleges that the mother of his children wears wigs and hair extensions, and also colors her hair, which could affect the accuracy of the tests. Robyn Merrett,, "Southern Charm's Kathryn Dennis Gets Joint Temporary Custody of Her Children with Thomas Ravenel," 17 Aug. 2019 General Electric disputed the accuracy of Markopolos’ findings and denied its allegations. Sergio Chapa, Houston Chronicle, "Fraud Expert: GE used Baker Hughes as a vehicle to hide multi-billion dollar losses," 15 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'accuracy.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of accuracy

1644, in the meaning defined at sense 1

History and Etymology for accuracy

accur(ate) + -acy

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Statistics for accuracy

Last Updated

21 Oct 2019

Look-up Popularity

Time Traveler for accuracy

The first known use of accuracy was in 1644

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More Definitions for accuracy



English Language Learners Definition of accuracy

: freedom from mistake or error : the quality or state of being accurate
: the ability to work or perform without making mistakes


ac·​cu·​ra·​cy | \ ˈa-kyə-rə-sē How to pronounce accuracy (audio) \

Kids Definition of accuracy

: freedom from mistakes

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Comments on accuracy

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transposition of initial sounds of words

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