- 1
Not sound; Not whole, not solid, defective.
- unsound mind
- 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
Not sound; Not good, unreliable.UKespecially
- You would not like Nietzsche, sir. He is fundamentally unsound.
ant. sound