unsound

adjective un·sound \ ˌən-ˈsau̇nd \

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

unsoundly

play \ˌən-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

Recent Examples of unsound from the Web

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.

First Known Use of unsound

14th century



UNSOUND Defined for English Language Learners

unsound

adjective

Definition of unsound for English Language Learners

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

  • : poorly built or in bad condition


UNSOUND Defined for Kids

unsound

adjective un·sound \ ˌən-ˈsau̇nd \

Definition of unsound for Students

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

Medical Dictionary

unsound

adjective un·sound \ -ˈsau̇nd \

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

unsoundness

noun

Law Dictionary

unsound

adjective un·sound \ ˌən-ˈsau̇nd \

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

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).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to suppress quietly or indirectly

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

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

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!