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

The Navy gambled that, in future conflicts, range would have to take a backseat to aircraft reliability and sortie generation. Kyle Mizokami, Popular Mechanics, "Boeing Will Build the Navy's MQ-25 Stingray Carrier-Based Tanker Drone," 4 Sep. 2018 The brand has won over consumers and critics for its vehicles’ safety, reliability and scrappiness. Jeff Yip, Houston Chronicle, "Newly arrived 2019 Subaru Ascent fills three-row midsize SUV niche," 24 June 2018 James Burgess, a senior leader at Project Wing, said previous FAA approvals in the United States for expanded testing have largely focused on technical questions, revolving around vital issues of reliability and safety. Michael Laris, Washington Post, "‘Going to mission!’: Drones are flying themselves, but how far should Washington let them go?," 23 June 2018 Three years into his sentence, other agencies started questioning the reliability of Fred Zain’s DNA evidence. Michael Harriot, The Root, "Stacey Abrams’ Sister Is Engaged to a Man Incarcerated 26 Years for a Rape and Robbery He Didn’t Commit," 25 May 2018 Meanwhile, Government Accountability Office audits have surfaced serious reliability and privacy concerns. Lily Hay Newman, WIRED, "Facial Recognition Tech Is Creepy When It Works—And Creepier When It Doesn’t," 9 May 2018 Blue Origin was created in 2000 by Bezos to develop private access to space by lowering the cost of travel and increasing reliability. Rose Minutaglio, Town & Country, "Jeff Bezos and Lauren Sanchez: Inside Their Relationship," 8 Feb. 2019 The two recent launch contracts with the Japanese company reflect confidence in the reliability of its service, Dickinson said. Eric Berger, Ars Technica, "Entering a crowded market, Japan’s new rocket scores an early win," 21 Dec. 2018 These utilities are responsible for the reliability of distribution systems. David Roberts, Vox, "Clean energy technologies threaten to overwhelm the grid. Here’s how it can adapt.," 30 Nov. 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

12 Mar 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).


grandiloquent, ostentatious, or bombastic

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