Unsound

//ˌʌnˈsaʊnd// adj

adj ·Common ·High school level

Definitions

Adjective
  1. 1
    Not sound; Not whole, not solid, defective.

    "unsound mind"

  2. 2
    Not sound; Infirm, diseased. especially

    "... A horse labouring under a temporary injury, capable of being speedily cured, is not unsound within the meaning of a warranty of soundness ..."

  3. 3
    Not sound; Not good, unreliable. UK, especially

    "You would not like Nietzsche, sir. He is fundamentally unsound."

Adjective
  1. 1
    of e.g. advice wordnet
  2. 2
    physically unsound or diseased wordnet
  3. 3
    suffering from severe mental illness wordnet
  4. 4
    not sound financially wordnet
  5. 5
    not in good condition; damaged or decayed wordnet
Show 1 more definition
  1. 6
    containing or based on a fallacy wordnet

Synonyms

All synonyms
decayedfallaciousunhealthyunreliableabnormalabsurd

Example

More examples

"Your position is unprovable and unsound."

Etymology

From un- + sound.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.