1. Not in good condition; damaged or decayed
   "an unsound foundation" 
2. Not sound financially
   "unsound banking practices" 
3. Containing or based on a fallacy
   "an unsound argument"
   - fallacious 
4. Suffering from severe mental illness
   "of unsound mind"
   - mentally ill, unstable 
5. Physically unsound or diseased
   "an unsound limb"; "unsound teeth"
   - bad, unfit 
6. Of e.g. advice

Derived forms: unsounder, unsoundest

See also: bad, broken, corroded, damaged, decayed, high-risk, injured, insane, invalid, long, risky, rotted, rotten, speculative, undependable, unfit, unhealthy, unreliable, unsoundness, unwholesome, wildcat

Antonym: sound

Encyclopedia: Unsound

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