to wrinkle the brows, as in frowning or displeasure; to put on a frowning look; to look sour, sullen, severe, or angry.-hence, to look gloomy, dark, or threatening; to lower.-to look at or repel with a scowl or a frown.-to express by a scowl; as, to scowl defiance.-the wrinkling of the brows or face in frowing; the expression of displeasure, sullenness, or discontent in the countenance; an angry frown.-hence, gloom; dark or threatening aspect.