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

For instance, non-invasive EEG systems generally capture weaker and noisier signals than implanted brain devices, making accuracy and reliability critical hurdles. — Rupendra Brahambhatt, Interesting Engineering, 19 July 2026

Handle the next doable action, then let reliability do what drama never could. — Tarot.com, The Orlando Sentinel, 19 July 2026

Nolan credits this robust partnership to Caine’s reliability. — Emma Urdangen, PEOPLE, 18 July 2026

Transparent reporting and metrics that capture carbon, water, reliability, and life cycle environmental impacts together are also critical. — Bridget Shirvell, Hartford Courant, 18 July 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