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

These engines are built for efficiency and reliability, with the ability to start quickly and maintain stable performance. —Prabhat Ranjan Mishra, Interesting Engineering, 25 Apr. 2026

Automotive repair site RepairPal gave the latest Ranger model year an above-average reliability score. —Saleen Martin, USA Today, 25 Apr. 2026

Electricity system reliability increased by 19% in 2025 compared with 2024. —George Avalos, Mercury News, 24 Apr. 2026

Ben Hatton, an analyst at CCS Insight who studies emerging consumer technologies, said reliability remains a key challenge. —ABC News, 24 Apr. 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