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

• 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

This reliability could speed up the shoe design cycle and reduce costs, while giving developers a clearer picture of real-world performance. —Aamir Khollam, Interesting Engineering, 16 Sep. 2025

The technology has shown bipartisan appeal for its relatively low operating costs and long-term reliability, often staying in service for a century or more. —Connor Giffin, Louisville Courier Journal, 15 Sep. 2025

The new app integrates the company’s reputation for reliability with a modern user interface. —Jeff Fromm, Forbes.com, 15 Sep. 2025

Company leaders emphasized that the changes should improve Alpha's resilience and reliability going forward. —Josh Dinner, Space.com, 15 Sep. 2025

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