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

The ranking is based on data collected from January to December 2025 and includes things like the convenience of store hours, ease of grocery pickup and the reliability of the store's mobile app. —Reia Li, AZCentral.com, 3 Feb. 2026

The organization also considers reliability and consumer satisfaction scores pulled from survey data. —Mary Cunningham, CBS News, 3 Feb. 2026

Vásquez has asserted that the new reservoir would provide capacity for an additional 11 to 13 daily transits, providing more schedule reliability for vessels passing through the trade artery. —Glenn Taylor, Sourcing Journal, 3 Feb. 2026

None grappled honestly with intermittency and whole-system reliability. —Alex Pavlak, Baltimore Sun, 1 Feb. 2026

Word History

First Known Use

1810, in the meaning defined at sense 1

Rhymes for reliability

• acceptability
• accessibility
• adaptability
• admissibility
• advisability
• affordability
• allowability
• amenability
• amiability
• appealability
• applicability
• availability

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