To wrinkle the brows, as in frowning or displeasure; to put on a frowning look; to look sour, sullen, severe, or angry.

To look at or repel with a scowl or a frown.

The wrinkling of the brows or face in frowing; the expression of displeasure, sullenness, or discontent in the countenance; an angry frown.

Hence, to look gloomy, dark, or threatening; to lower.

Hence, gloom; dark or threatening aspect.

To express by a scowl; as, to scowl defiance.

a totally unnecessary expression