Search Dictionary
Definition of reliability

reliability

/ɹɪˌlaɪ.əˈbɪl.ə.ti/
re · li · a · bil · i · ty
Adverb:reliably
•
Plural:reliabilities
•
Adjective:reliable
JUMP TO:

reliability Lexical Profile

reliability Game Scores & Validity

• noun

1

The quality of being trustworthy or of performing consistently well.

Example

"When purchasing a family car, many buyers prioritize safety and reliability over high speed."

2

The degree to which the result of a measurement, calculation, or specification can be depended on to be accurate and consistent across repeated trials.

Example

"The researchers repeated the experiment three times to ensure the reliability of their data."

Synonyms
View all synonyms for reliability
Antonyms
View all antonyms for reliability

Word Nuance & Usage

In academic research and statistics, reliability refers specifically to the consistency and repeatability of a measurement, whereas validity refers to whether the test accurately measures what it claims to measure.

• Rhymes for reliability

• Nearby Words

relevance
relevant
relevantly
reliability
reliable
reliably
reliance

Cite this Entry

Wordmom. (2026). Definition of Reliability. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/reliability
Built for writers, students, and competitive word game players, Wordmom combines an uncluttered English dictionary and thesaurus with fast, pattern-based word finders so you can verify definitions, synonyms, and high-scoring tile plays in one place.
Word Games & Solvers
Word FinderScrabble Word FinderWords With Friends CheatWordle SolverAnagram Solver
Dictionary & Reference
DictionarySynonymsAntonymsWords
Community
Contact UsEditorial PolicyPrivacy PolicyTerms and Conditions
© 2016–2026 Wordmom Network. All rights reserved. Made with for word lovers everywhere.
Disclaimer: SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A. and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. Words With Friends® is a registered trademark of Zynga Inc. Wordle® is a registered trademark of The New York Times Company. Other referenced game titles and tournament lexicon codes (including NASPA NWL and WESPA/HarperCollins CSW) are trademarks of their respective owners. Wordmom is an independent reference utility for educational and entertainment purposes and is not affiliated with, sponsored by, or endorsed by Hasbro, Mattel, Spear, Zynga, The New York Times Company, NASPA, WESPA, or HarperCollins Publishers. All game names are referenced strictly under nominative fair use to indicate compatibility.