unsound

adjective
un·​sound | \ ˌən-ˈsau̇nd How to pronounce unsound (audio) \

Definition of unsound

: not sound: such as
a : not healthy or whole an unsound horse
b : not mentally normal : not wholly sane of unsound mind
c : not firmly made, placed, or fixed structurally unsound
d : not valid or true : invalid, specious unsound beliefs

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Other Words from unsound

unsoundly \ ˌən-​ˈsau̇n(d)-​lē How to pronounce unsound (audio) \ adverb

Synonyms & Antonyms for unsound

Synonyms

Antonyms

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Examples of unsound in a Sentence

The roof is structurally unsound. disgruntled relatives tried to prove that the woman was of unsound mind when she made her will
Recent Examples on the Web Boarded up and structurally unsound, the 94-year old California Theatre building at 1122 Fourth Ave. San Diego Union-Tribune, "Bullet dodged? $350M California Theatre project on track to replace decaying building with condos, hotel," 27 Apr. 2021 The church sanctuary was structurally unsound and didn’t have a roof, so the church used its field adjoining Greensboro Avenue, after a cleaning crew cleared it of rubble and scrap metal blown onto it from a nearby recycling center. al, "Pastor of disaster: Minister weathered April 27, 2011 tornado and a hurricane," 27 Apr. 2021 The bulky wing mechanism made both problems worse, piling additional weight and intricacy onto an increasingly unsound design. David Axe, Forbes, "The F-111 Was The ‘F-35 Of Its Day’—But Its Failure Was A Boon To U.S. Air Power," 26 Feb. 2021 In an interview, Planning and Economic Development Director Nicolle Goodman said Wednesday's vote was the next step in a process that began in 2017, when structurally unsound buildings on the site were identified and demolished. Emma Nelson, Star Tribune, "St. Paul tees up tax incentives for development around Allianz Field," 28 Oct. 2020 Morrison had been censured for an inappropriate social media post and thought the censuring was legally unsound. Gustavo Solis, San Diego Union-Tribune, "National City hires new city attorney," 26 Oct. 2020 The president's executive order on Section 230 was politically motivated and legally unsound. Jon Brodkin, Ars Technica, "Ajit Pai says he’ll help Trump impose crackdown on Twitter and Facebook," 15 Oct. 2020 Those issues resulted in Boeing taking the unusual step last month of voluntarily grounding eight 787s as structurally unsound. Doug Cameron And Andy Pasztor, WSJ, "Boeing Flags Additional 787 Production Problem," 8 Sep. 2020 The same cannot be said for the enemies' art style, which revolves around invented races of aliens who come in anatomically unsound shapes and colors. Sam Machkovech, Ars Technica, "Battletoads game review: Good moments don’t save the toad-al package," 19 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unsound.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of unsound

14th century, in the meaning defined above

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Time Traveler for unsound

Time Traveler

The first known use of unsound was in the 14th century

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Statistics for unsound

Last Updated

4 May 2021

Cite this Entry

“Unsound.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unsound. Accessed 16 May. 2021.

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More Definitions for unsound

unsound

adjective

English Language Learners Definition of unsound

: not based on truth or logic : not showing good judgment
: poorly built or in bad condition

unsound

adjective
un·​sound | \ ˌən-ˈsau̇nd How to pronounce unsound (audio) \

Kids Definition of unsound

1 : not based on good reasoning or truth an unsound argument unsound advice
2 : not firmly made or placed an unsound building
3 : not healthy or in good condition unsound teeth
4 : being or having a mind that is not normal

unsound

adjective
un·​sound | \ -ˈsau̇nd How to pronounce unsound (audio) \

Medical Definition of unsound

: not sound: as
a : not healthy or whole an unsound limb an unsound horse
b : not mentally normal : not wholly sane of unsound mind
c : not fit to be eaten unsound food

Other Words from unsound

unsoundness noun

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unsound

adjective
un·​sound | \ ˌən-ˈsau̇nd How to pronounce unsound (audio) \

Legal Definition of unsound

: not sound: as
a : not healthy or whole
b : not mentally normal : not wholly sane of unsound mind
c : not firmly made, placed, or fixed
d : not valid or true an unsound argument

Other Words from unsound

unsoundly adverb
unsoundness noun

Comments on unsound

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