reliability

noun

re·​li·​abil·​i·​ty ri-ˌlī-ə-ˈbi-lə-tē How to pronounce reliability (audio)
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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Although outdoor tests have begun, long-term reliability data remain limited. Aamir Khollam, Interesting Engineering, 11 Nov. 2025 For businesses hosting servers, conducting frequent large-file transfers, or relying on video collaboration, an SLA ensures that your provider is contractually committed to performance and reliability. Roxanne Downer, USA Today, 10 Nov. 2025 Red Team testing subjects the system to adversarial evaluation, ensuring resilience and reliability. Mark Howard, Time, 10 Nov. 2025 The project’s goals are to enhance safety and reliability on I-70, maintain area bridges and pavement, and improve community access while minimizing traffic disruptions, the transportation department said. Kansas City Star, 7 Nov. 2025 See All Example Sentences for reliability

Word History

First Known Use

1810, in the meaning defined at sense 1

Time Traveler
The first known use of reliability was in 1810

Browse Nearby Words

Cite this Entry

“Reliability.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reliability. Accessed 14 Nov. 2025.

Kids Definition

reliability

noun
re·​li·​abil·​i·​ty ri-ˌlī-ə-ˈbil-ət-ē How to pronounce reliability (audio)
plural reliabilities
: the quality or state of being reliable

Medical Definition

reliability

noun
re·​li·​abil·​i·​ty ri-ˌlī-ə-ˈbil-ət-ē How to pronounce reliability (audio)
plural reliabilities
: the extent to which an experiment, test, or measuring procedure yields the same results on repeated trials

More from Merriam-Webster on reliability

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!