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

Brown submitted a supplement to the motion to reopen based on new information that attorney Susan Simpson had uncovered about the reliability of cell tower evidence. Emma Dibdin, Harper's BAZAAR, "A Complete Timeline of The Case Against Adnan Syed," 31 Mar. 2019 Questions about the reliability of American commitments keep the... Walter Russell Mead, WSJ, "Allies Worry Over U.S. Public Opinion," 4 Mar. 2019 Automation often means humans are forced to emulate the qualities that managers desire from machines: efficiency, reliability, and especially control. James Vincent, The Verge, "I welcomed our new robot overlords at Amazon’s first AI conference," 27 June 2019 These contracts — with utilities National Grid, Eversource, and Unitil — were set in motion by a 2016 energy law aimed at increasing the grid’s reliability and curbing greenhouse gas emissions., "State DPU approves contracts with Hydro-Quebec," 26 June 2019 The work should result in higher production volumes and better reliability and performance from its equipment. Bob Tita, WSJ, "U.S. Steel Seeks to Make More With Fewer Furnaces," 25 June 2019 That says something about the success of Ain’t Misbehavin’. ’Cause Capricorn is all about purpose, discipline, reliability, sturdiness. Diane Snyder, Billboard, "Tony Nominee Spotlight: Andre De Shields Reflects on His 50 Year Career & Playing Hermes in 'Hadestown'," 8 June 2019 Consistency, reliability and tradition hold up the roof and pay the bills for a place that’s been open since 1929. Mike Sutter,, "Zero-star review: Grey Moss Inn falls behind the times northwest of San Antonio," 6 June 2019 That will include the price of the plane, as well as guarantees on fuel efficiency, maintenance costs, and reliability. Angus Whitley,, "World’s longest flight — Sydney to London — to be even less comfortable than expected," 5 June 2019

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

16 Jul 2019

Look-up Popularity

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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