noun
1. a condition of damage or decay
• Ant: ↑soundness
• Derivationally related forms: ↑unsound
2. a misconception that is fallacious and not true or valid
-
the unsoundness of his conclusion was obvious
• Derivationally related forms: ↑unsound
• Hypernyms: ↑misconception
3. not mentally or physically healthy
-
no one can be a poet without a certain unsoundness of mind
• Ant: ↑soundness
• Derivationally related forms: ↑unsound
Useful english dictionary. 2012.