Meaning of unsound

Definition of unsound

(adj) not in good condition; damaged or decayed; "an unsound foundation"
not sound financially; "unsound banking practices"
containing or based on a fallacy; "fallacious reasoning"; "an unsound argument"
suffering from severe mental illness; "of unsound mind"
physically unsound or diseased; "has a bad back"; "a bad heart"; "bad teeth"; "an unsound limb"; "unsound teeth"
of e.g. advice

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