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

Financial access, data systems, transportation networks, and energy reliability form the base upon which industries can develop with consistency. —Lyssanoel Frater, USA Today, 1 May 2026

There have been some issues with AI reliability. —Benjamin Svetkey, HollywoodReporter, 1 May 2026

Apply that same urgency to transit reliability by focusing on the busiest routes, closing staffing gaps and being honest with riders about real performance. —Chicago Tribune, 1 May 2026

The battery system stores excess solar energy generated during the day and releases it during peak demand periods, helping reduce energy costs and improve grid reliability. —City News Service, Daily News, 1 May 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