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 It also is meant to identify policies focused on affordability and reliability of electricity. Sarah Bowman, The Indianapolis Star, "Will Indiana stick with coal or embrace renewables? Energy task force to decide next week," 17 Nov. 2020 Lawmen, outlaws, scouts, and cowboys loved the accuracy, power, and reliability of the Colt. Matthew Moss, Popular Mechanics, "How the Colt Single Action Army Revolver Won the West," 16 Nov. 2020 Pei Su, cofounder and CEO of ACTAsia, an organization focused on animal welfare in Asia, says groups estimating the size of the fur industry have historically underestimated China’s output due to questions around reliability of its data. Marc Bain, Quartz, "Covid fears are disrupting the $30 billion global fur industry," 13 Nov. 2020 First, the predictive power and reliability of this technology must be confirmed, and that will require several advances. Daniel E. Hurtado, Scientific American, "Virtual Patients Could Revolutionize Medicine," 10 Nov. 2020 Biden has signaled his desire to reengage with the World Health Organization and other global institutions but will have to do so amid a roiling health crisis — and deep skepticism among U.S. allies about American reliability. Washington Post, "Biden eager to jump back into coronavirus fight, but world is still smarting," 9 Nov. 2020 Yet diplomats warn that Biden, constrained by probable continued Republican control of the Senate, can’t undo all that’s changed and won’t be able to sweep away concerns over America’s long-term reliability in foreign affairs. David Wainer,, "Allies Prepare for U.S. U-Turn as Biden Shifts Priorities," 8 Nov. 2020 Up to this point, one of the biggest issues surrounding rapid tests has been reliability. Evan Macdonald, cleveland, "A coronavirus saliva test with results texted in 30 minutes? Northeast Ohio company, Purdue researchers aim to make it reality," 5 Nov. 2020 The state’s publicly reported testing data includes only molecular tests that are analyzed at labs, not the quick-result antigen tests that are becoming more available but have less reliability. Pamela Wood,, "Maryland Gov. Hogan to offer coronavirus update Thursday," 5 Nov. 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 Nov 2020

Cite this Entry

“Reliability.” Dictionary, Merriam-Webster, Accessed 27 Nov. 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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