re·​li·​abil·​i·​ty | \ ri-ˌlī-ə-ˈbi-lə-tē \

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

Those costs include fixing signals, improving tracks and boosting power reliability. Paul Berger, WSJ, "Congestion Fee Lawsuit Could Cost MTA $17 Million in Revenue," 2 Jan. 2019 The keyboard reliability and throttling issues that plagued earlier iterations of the device have largely been ironed out. Jeff Dunn, Ars Technica, "The Ars Holiday Gift Guide 2018—good tech for the power user in your life," 4 Dec. 2018 By opening up access, devices that can retrieve a signal from both Galileo and the US GPS system will see improved timing estimates and location reliability. Makena Kelly, The Verge, "FCC paves the way for improved GPS accuracy," 15 Nov. 2018 Facebook is no slouch at this stuff — its speed and reliability has long been a trademark, and its sense of visual and interaction design is better than most. Dan Frommer, Recode, "How Facebook could screw up Instagram now that its founders are leaving," 27 Sep. 2018 Also, readers are able to make judgments about the reliability of those whose identities are provided. WSJ, "About the Newsroom," 9 Oct. 2018 For the same reason, this doesn't tell us much about the reliability of high-profile, prestigious journals, either. Cathleen O'grady, Ars Technica, "Social science has a complicated, infinitely tricky replication crisis," 28 Aug. 2018 Any concerns about the reliability of these drives should also be allayed by the three-year warranty promised by Samsung. Vlad Savov, The Verge, "Mass production of 4TB QLC SSDs begins," 7 Aug. 2018 The defense did not challenge Creigh's truthfulness, but raised concerns about the reliability of his memory of what happened in 1976. Houston Chronicle, "Australian archbishop convicted of child sex abuse cover-up," 22 May 2018

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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Last Updated

15 Jan 2019

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Time Traveler for reliability

The first known use of reliability was in 1810

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More Definitions for reliability


re·​li·​abil·​i·​ty | \ ri-ˌlī-ə-ˈbi-lə-tē \

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 \
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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Comments on reliability

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involving abstract or general statements

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