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

Sustainability and reliability One of the biggest challenges facing the market is how microgrids are deployed sustainably, as much of the discussion on the tech has revolved around the use of gas turbines or fuel cells, Diego Diaz Hernandez, a partner at McKinsey, told CNBC. —April Roach,gaelle Legrand, CNBC, 11 Mar. 2026

The city is already seeing significant investments in data centers, due to its abundant power supply and its agreement with PG&E that promises better speed and reliability. —Devan Patel, Mercury News, 10 Mar. 2026

What matters is that the system delivers reliability, affordability, and sustainability together. —John Kerry, semafor.com, 10 Mar. 2026

Your reliability builds lasting bridges that support future goals. —Tarot.com, The Orlando Sentinel, 9 Mar. 2026

Word History

First Known Use

1810, in the meaning defined at sense 1

Rhymes for reliability

• acceptability
• accessibility
• adaptability
• admissibility
• advisability
• affordability
• allowability
• amenability
• amiability
• appealability
• applicability
• availability

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