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

Pino's defense team aggressively questioned the reliability of the navigation data. —Ana Maria Soler, CBS News, 13 June 2026

Taxpayers supporting these major upgrades should be able to see how infrastructure works in real time and how those investments are improving reliability and resilience. —Gregg Herrin, Fortune, 13 June 2026

How Firmoo Stands Out When buying prescription glasses online, clarity and reliability matter just as much as style. —Footwear News, 12 June 2026

For enterprise leaders, the next phase of development is about refining and integrating AI reliability across the entire software life cycle. —Fabio Caversan, Forbes.com, 12 June 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