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

In 2018, Oris transcended mere reliability, to my mind: Its Big Crown Pointer Date 80th Anniversary is truly handsome. Michael Clerizo, WSJ, "The Best Watches of 2018," 18 Dec. 2018 To this day, many of the principles Mr. Heart emphasized — reliability, error resistance and the capacity for self-correction — remain central to the internet’s robustness. Katie Hafner, New York Times, "Frank Heart, Who Linked Computers Before the Internet, Dies at 89," 25 June 2018 Transportation and environment advocates with the Move All Seattle Sustainably (MASS) Coalition called on city officials to extend that transit priority north from Stewart Street to Denny Way to improve bus reliability. Heidi Groover, The Seattle Times, "Bus riders, drivers adapt as hundreds more buses hit downtown Seattle streets," 25 Mar. 2019 Prosecutors urged judges to convict him on all charges, while Ntaganda's attorneys challenged the reliability of many defense witnesses and said judges should acquit him. Mike Corder, Fox News, "Congo rebel on trial at ICC denies involvement in atrocities," 30 Aug. 2018 The short-term restriction is part of an experiment to see whether a simple change can speed up express bus service, improve reliability and draw more riders. Martine Powers, Washington Post, "Metro wants bus trips to be faster, and getting rid of cash may be the answer," 26 May 2018 As a practical matter, too much time has passed in terms of the reliability of witness recollections. Michael Mccann,, "Analyzing the Legal Fallout of Matt Patricia’s Sexual Assault Indictment," 10 May 2018 Teen Vogue Take To view this video please enable JavaScript, and consider upgrading to a web browser that : 0%: 0% Now, full disclosure: these reports are from multiple sources with varying degrees of reliability. Kim Quindlen, Teen Vogue, "New iPhone X and iPhone SE Rumors Suggest New Apple Lineup," 27 Apr. 2018 Still, modern jet engines are a paragon of reliability. Jack Stewart, WIRED, "Airlines Check Their Engines for the Flaw That Hit Southwest Flight 1380," 19 Apr. 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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Statistics for reliability

Last Updated

21 May 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 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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Comments on reliability

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


a strong desire or propensity

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