reliability

noun

re·​li·​abil·​i·​ty ri-ˌlī-ə-ˈbi-lə-tē 

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

Synonyms of reliability

• reliableness
• dependability
• responsibility
• trustworthiness
• solidity

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

Wall Street’s current estimates underappreciate potential upside from upcoming data-center power deals and accelerating grid reliability needs, giving earnings estimates clear room to move higher. — Michael Khouw, CNBC, 2 Oct. 2026

What readers are saying The comments reflect a range of opinions on male contraception, with many expressing skepticism about men's reliability in using birth control consistently. — Margaret Hetherman, Washington Post, 30 Sep. 2026

New generation capacity, grid reliability and a focus on keeping Arkansas' electricity rates among the lowest in the nation are crucial to the state's future success. — Arkansas Online, 28 Sep. 2026

Experts caution that clinic-grade lasers and consumer LED devices differ significantly in output and reliability, and quality varies widely across at-home products. — Hanna Wickes, Kansas City Star, 28 Sep. 2026

Word History

First Known Use

1810, in the meaning defined at sense 1

Rhymes for reliability

• affability
• audibility
• bistability
• capability
• changeability
• contractility
• credibility
• culpability
• disability
• disutility
• durability
• fallibility

Kids Definition

reliability

noun

re·​li·​abil·​i·​ty ri-ˌlī-ə-ˈbil-ət-ē 

plural reliabilities

: the quality or state of being reliable

Medical Definition

reliability

noun

re·​li·​abil·​i·​ty ri-ˌlī-ə-ˈbil-ət-ē 

plural reliabilities

: the extent to which an experiment, test, or measuring procedure yields the same results on repeated trials