The meaning of UNSOUND is not sound. How to use unsound in a sentence.

unsound adjective (WEAK) If a building or other structure is unsound, it is in bad condition and likely to fall down or fail:

Definition of unsound adjective in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

UNSOUND definition: not sound; unhealthy, diseased, or disordered, as the body or mind. See examples of unsound used in a sentence.

1. Not dependably strong or solid. 2. Not physically or mentally healthy. 3. Not true or logically valid; fallacious: an unsound conclusion.

un•sound (un sound′), adj., -er, -est. 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 …

If something or someone is unsound, they are unreliable. No sensible person would put his money in a bank he knew to be unsound.

UNSOUND meaning: 1 : not based on truth or logic not showing good judgment; 2 : poorly built or in bad condition

Oct 8, 2025 · unsound (comparative more unsound or unsounder, superlative most unsound or unsoundest) In the ensuing financial panic, many persons sustained heavy losses, and large …

There are 12 meanings listed in OED's entry for the adjective unsound, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.