definition of
[unsound]

[1] #1 unsound a. not in good condition; damaged or decayed; "an unsound foundation". wn

[2] #2 unsound a. not sound financially; "unsound banking practices". wn

[3] #3 unsound s. [fallacious] containing or based on a fallacy; "fallacious reasoning"; "an unsound argument". wn

[4] #4 unsound s. [mentally ill, unstable] suffering from severe mental illness; "of unsound mind". wn

[5] #5 unsound s. [bad, unfit] physically unsound or diseased; "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth". wn