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

Artificial intelligence has complicated the reliability of admissions essays. — Scott White, Forbes.com, 5 July 2026

The trials focused on refining launch performance and operational reliability in dynamic maritime conditions. — Bojan Stojkovski, Interesting Engineering, 4 July 2026

Filter your search by your budget, then look for cars with the lowest mileage from brands with strong reliability ratings. — Chris Teague, AJC.com, 3 July 2026

On Monday, Six Flags announced that the ride's manufacturer would make enhancements to the Gold Rusher's vehicle to improve its performance, availability, and reliability. — Dan Raby, CBS News, 1 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