noun. The state of being sound, in any sense.

noun. The quality or state of being sound

noun. The state or quality of being sound.

noun. The result or product of being sound.

noun. The property (of an argument) of not only being valid, but also of having true premises.

noun. The property of a logical theory that whenever a wff is a theorem then it must also be valid. Symbolically, letting T represent a theory within logic L, this can be represented as the property that whenever is true, then must also be true, for any wff φ of logic L.

noun. a state or condition free from damage or decay

noun. the quality of being prudent and sensible

noun. the muscle tone of healthy tissue

strength  

cleanliness  clearness  completeness  correctness  disinterestedness  

admissibility  advantageousness  agreeableness  aplomb  auspiciousness  

sound