ac·cu·ra·cy | \ ˈa-kyə-rə-sē , 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

That’s the accuracy rate that scientists claim for a blood test assessing whether a child is on the autism spectrum. Alex Kingsbury,, "Big Data: 88 percent accuracy rate," 6 July 2018 His goal against Serbia in the group stage was nice, but his passing stats over all three games were even nicer: an average of 84.3 attempted passes per game with a 90.5 percent accuracy rate. Jonathan Tannenwald,, "World Cup schedule, TV and streaming info: Sweden-Switzerland, Colombia-England," 2 July 2018 Her mother advises government and nonprofit groups on voting systems security and accuracy issues. New York Times, "Rebecca Garland, Xan Tanner," 17 June 2018 Initial trials suggest the AI has a 78 percent accuracy rate in detecting normal weight individuals; Kimetrica is currently working on trials with photos of malnourished children. Emily Matchar, Smithsonian, "Can AI Tell If a Child Is Malnourished?," 8 June 2018 The overall message from the WWDC presentation is with so much disappointment over Siri's accuracy rate, perhaps Apple is just subtly trying to expand the meaning of what Siri is, says Kinsella. Jefferson Graham, USA TODAY, "Apple, where's the smarter Siri in iOS 12?," 6 June 2018 That first Carreyrou story reported that Theranos’s blood-testing machine had significant accuracy issues and had been used for only 15 out of a claimed 240 tests. Yashar Ali, Daily Intelligencer, "The Reporter Who Took Down a Unicorn," 24 May 2018 If a coach can rein him in a bit, limit the hero ball and help shore up his footwork, which should fix his accuracy issues, Darnold could develop into a top-10 quarterback. Steven Ruiz, For The Win, "Ranking the 9 best quarterback prospects in the 2018 NFL draft," 24 Apr. 2018 Though many would prefer to look at average pay, The Plain Dealer has ranked districts by the median because of some accuracy issues in state data on average pay. Patrick O'donnell,, "How much are teachers paid in Ohio? Search here for your district," 22 Apr. 2018

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

9 Sep 2018

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 \

Kids Definition of accuracy

: freedom from mistakes

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Comments on accuracy

What made you want to look up accuracy? Please tell us where you read or heard it (including the quote, if possible).


occurring twice a year or every two years

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