Search Dictionary
Definition of soundness

soundness

/ˈsaʊnd.nəs/
sound · ness
Adverb:soundly
•
Adjective:sound
JUMP TO:

soundness Lexical Profile

soundness Game Scores & Validity

• noun

1

The state of being in good physical, structural, or financial condition, free from injury, defect, decay, or instability.

Example

"Engineers conducted a thorough inspection to verify the structural soundness of the historic bridge."

2

The quality of being based on valid reason, good judgment, or reliable principles; in formal logic, the property of an argument that is both logically valid and has true premises.

Example

"The legal panel questioned the soundness of the defense attorney's constitutional argument."

3

Thoroughness or depth, especially regarding sleep or rest.

Example

"The soundness of the infant's sleep allowed the exhausted parents to finally rest."

Synonyms
View all synonyms for soundness
Antonyms
View all antonyms for soundness

Word Nuance & Usage

In formal logic, 'soundness' is distinct from 'validity': an argument is valid if its conclusion follows logically from its premises, whereas it possesses soundness only if it is both valid and its premises are actually true.

• Rhymes for soundness

• Nearby Words

soundlessly
soundly
soundman
soundness
soundproof
soundproofing
soundscape

Cite this Entry

Wordmom. (2026). Definition of Soundness. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/soundness
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.