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

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 Meantime, a small, 30-patient study this week cast doubts about rapid Covid tests’ reliability early on after infection, showing that the tests took several days after infection before detecting the virus. Matthew Herper, STAT, 9 Jan. 2022 The speed and reliability of the account finding these deals has become a stalwart Twitter service. Washington Post, 7 Jan. 2022 First, at-home tests have been shown to have disappointing reliability in the early days of infection — especially before symptoms show up. Andy Larsen, The Salt Lake Tribune, 7 Jan. 2022 Secondly, creating efficient pipelines and repeatable processes will power innovation and reliability as well as support the build, validation and release of updates onto your data platform. Nick Dearden, Forbes, 5 Jan. 2022 Tomassi credits the increase in sales to Toyota's aggressive leasing and vehicle reliability. Jamie L. Lareau, Detroit Free Press, 4 Jan. 2022 Key to this practicality were high-reliability vacuum tubes and the development of the first core memory. Frank O’brien, Ars Technica, 4 Jan. 2022 Fortunately, reliability and maintenance costs aren't part of this challenge because his car runs on $100 bills. Tony Quiroga, Car and Driver, 26 Dec. 2021 Ultimately, arguments around emissions, reliability and economics may be cast aside. Julia Horowitz, CNN, 19 Dec. 2021

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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Dictionary Entries Near reliability



reliability coefficient

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Statistics for reliability

Last Updated

13 Jan 2022

Cite this Entry

“Reliability.” Dictionary, Merriam-Webster, Accessed 19 Jan. 2022.

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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

More from Merriam-Webster on reliability

Nglish: Translation of reliability for Spanish Speakers

Britannica English: Translation of reliability for Arabic Speakers


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