re·​li·​abil·​i·​ty | \ ri-ˌlī-ə-ˈbi-lə-tē How to pronounce reliability (audio) \

Definition of reliability

1 : the quality or state of being reliable
2 : the extent to which an experiment, test, or measuring procedure yields the same results on repeated trials

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Examples of reliability in a Sentence

we never had reason to question the reliability of the park rangers in the event of an emergency
Recent Examples on the Web Importers can never again be sure of the safety or reliability of Chinese exports. Victor Davis Hanson, National Review, "Pandemic Is but One of America’s Security Concerns," 23 Apr. 2020 The Comprehensive Nuclear Test Ban Treaty allows some activity to assure the safety and reliability of nuclear weapons so long as the experiments don’t produce a nuclear-explosive yield. Caitlin Yilek, Washington Examiner, "US concerned China may be secretly conducting nuclear tests," 15 Apr. 2020 Keeping the APs high means that there are fewer obstructions—like bulky furniture or human bodies—in between the AP and its connected devices, which in turn significantly improves connection quality and reliability. Jim Salter, Ars Technica, "Your COVID-19 Internet problems might be COVID-19 Wi-Fi problems," 14 Apr. 2020 Nevertheless, that list of games doesn’t necessarily have a killer app, Google isn’t talking about its own internally developed Stadia-exclusive titles quite yet, and the quality and reliability of Google’s service is unproven in the wild. Sean Hollister, The Verge, "Google’s Stadia game service is officially coming November: Everything you need to know," 6 June 2019 Sprint’s mobile app ranked below its competitor’s apps — customers rated it the lowest for both quality and reliability. NBC News, "America's favorite (and least favorite) wireless companies and smartphones," 4 June 2019 There’s still enough snow to ski at many resorts, but Japan’s built its international reputation on the reliability of its deep annual snowfalls. Peter Elstrom,, "Japan's Ski Areas Are Having Their Worst Winter in Decades," 29 Apr. 2020 But scientists and physicians are skeptical about the reliability of the dozens of tests that have hit the market because many have not been reviewed by the FDA. Alicia Lee, CNN, "What is herd immunity and why some think it could end the coronavirus pandemic," 23 Apr. 2020 Dozens of different antibody blood tests are now available, but the majority of them have not been approved by the Food and Drug Administration, leading to concerns about the reliability of results. Anchorage Daily News, "Governors call out White House on dearth of coronavirus testing as protests grow," 20 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'reliability.' 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 reliability

1810, in the meaning defined at sense 1

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Time Traveler for reliability

Time Traveler

The first known use of reliability was in 1810

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Statistics for reliability

Last Updated

20 May 2020

Cite this Entry

“Reliability.” Dictionary, Merriam-Webster, Accessed 29 May. 2020.

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More Definitions for reliability


re·​li·​abil·​i·​ty | \ ri-ˌlī-ə-ˈbi-lə-tē How to pronounce reliability (audio) \

Kids Definition of reliability

: the quality or state of being fit to be trusted or relied on a car's reliability


re·​li·​abil·​i·​ty | \ ri-ˌlī-ə-ˈbil-ət-ē How to pronounce reliability (audio) \
plural reliabilities

Medical Definition of reliability

: the extent to which an experiment, test, or measuring procedure yields the same results on repeated trials

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