Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

unsound

play
adjective un·sound \-ˈsau̇nd\

Simple Definition of unsound

  • : not based on truth or logic : not showing good judgment

  • : poorly built or in bad condition

Source: Merriam-Webster's Learner's Dictionary

Full Definition of unsound

  1. :  not sound: 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>

unsoundly

play \-ˈsau̇n(d)-lē\ adverb

Examples of unsound in a sentence

  1. The roof is structurally unsound.

  2. <disgruntled relatives tried to prove that the woman was of unsound mind when she made her will>



14th Century

First Known Use of unsound

14th century



UNSOUND Defined for Kids

unsound

play
adjective un·sound \ˌən-ˈsau̇nd\

Definition of unsound for Students

  1. 1 :  not based on good reasoning or truth <an unsound argument> <unsound advice>

  2. 2 :  not firmly made or placed <an unsound building>

  3. 3 :  not healthy or in good condition <unsound teeth>

  4. 4 :  being or having a mind that is not normal




Medical Dictionary

unsound

play
adjective un·sound \-ˈsau̇nd\

Medical Definition of unsound

  1. :  not sound: asa:  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>

unsoundness

noun



Law Dictionary

unsound

play
adjective un·sound \ˌən-ˈsau̇nd\

Legal Definition of unsound

  1. :  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>

unsoundly

adverb

unsoundness

noun




Seen and Heard

What made you want to look up unsound? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to proceed clumsily or ineffectually

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

interruption torrent megillah rebellion
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ