To contract the brow as an expression of displeasure or severity, or merely of perplexity, concentrated attention, etc.; put on a stern or surly look; scowl.To look or act disapprovingly or threateningly; lower: as, to frown upon a scheme.To repress or repel by an aspect of displeasure; rebuke by a stern or angry look or by severe words or conduct: as, to frown one into silence; to frown down a proposition.n. A contraction or wrinkling of the brow expressing displeasure or severity, or merely perplexity, difficult concentration of thought, etc.; a severe or stern look; a scowl.n. Any expression or show of disapproval or displeasure: as, the frowns of Providence.