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

As implementation becomes less scarce, value moves toward judgment, integration, verification, security, reliability and operational ownership. — Luis Aburto, Forbes.com, 16 Oct. 2026

Their effectiveness, however, depends on factors such as the operational reliability of the submarine, missile performance, communications, navigation and the ability to deploy the weapons under realistic conditions. — Prabhat Ranjan Mishra, Interesting Engineering, 16 Oct. 2026

Product quality, reliability and consistency help create the loyalty that marketing alone cannot buy. — Chris Hardesty, AJC.com, 16 Oct. 2026

Earlier this year Microsoft laid out a plan to fix Windows 11, with a focus on performance, reliability, and the overall OS experience. — Tom Warren, The Verge, 15 Oct. 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