to make as dead; to impair in vigor, force, activity, or sensation; to lessen the force or acuteness of; to blunt; as, to deaden the natural powers or feelings; to deaden a sound.-to lessen the velocity or momentum of; to retard; as, to deaden a ship's headway.-to make vapid or spiritless; as, to deaden wine.-to deprive of gloss or brilliancy; to obscure; as, to deaden gilding by a coat of size.