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 With careful engineering and problem solving, the company has increased clock accuracy from within 10 milliseconds to within 100 microseconds. Caroline Delbert, Popular Mechanics, "Facebook Just Made a Time Syncing Breakthrough," 18 Mar. 2020 This mapping method, however, is plagued by ambiguities and lacks the accuracy necessary to clearly reveal the galaxy’s spiral structure. Mark J. Reid, Scientific American, "A New Map of the Milky Way," 17 Mar. 2020 But there have been no suggestions that the W.H.O. test, distributed worldwide, has such significant accuracy problems. New York Times, "Did Federal Officials Really Question W.H.O. Tests for Coronavirus?," 17 Mar. 2020 The rear sight is mounted on a Picatinny rail, which can accommodate red-dots for better accuracy with such a diminutive load. Colin Moore, Outdoor Life, "15 Best Pieces of New Turkey Gear for 2020," 16 Mar. 2020 During the early ramp-up of testing, there were some concerns about the test’s accuracy after one study found 3% of tests in China came back negative when the samples were actually positive. Maureen Ferran, The Conversation, "How does the coronavirus test work? 5 questions answered," 12 Mar. 2020 Weiss could expound on subjects from Soviet ICBM accuracy to year-over-year wheat production in Bulgaria. Alex French, Wired, "The Secret History of a Cold War Mastermind," 11 Mar. 2020 To be sure, evaluating global temperature projections are not the only gauge of a model's accuracy. Jeff Berardelli, CBS News, "10 common myths about climate change — and what science really says," 27 Feb. 2020 Data points campaigns collect are triangulated, to achieve accuracy, according to Haynes. Olivia Goldhill, Quartz, "Why you get campaign texts calling you the wrong name," 22 Feb. 2020

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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Time Traveler for accuracy

Time Traveler

The first known use of accuracy was in 1644

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Statistics for accuracy

Last Updated

24 Mar 2020

Cite this Entry

“Accuracy.” Dictionary, Merriam-Webster, Accessed 3 Apr. 2020.

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More Definitions for accuracy


How to pronounce accuracy (audio)

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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