- not sound; unhealthy, diseased, or disordered, as the body or mind.
- decayed or impaired, as timber or foods; defective.
- not solid or firm, as foundations.
- not well-founded or valid; fallacious: an unsound argument.
- easily broken; light: unsound slumber.
- not financially strong; unreliable: an unsound corporation.
- diseased, weak, or unstable
- unreliable or fallacious
- lacking solidity, strength, or firmness
- of doubtful financial or commercial viability
- (of fruit, timber, etc) not in an edible or usable condition
