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

2. (v. i.) Hence, to look gloomy, dark, or threatening; to lower.

3. (v. t.) To look at or repel with a scowl or a frown.

4. (v. t.) To express by a scowl; as, to scowl defiance.

5. (n.) The wrinkling of the brows or face in frowning; the expression of displeasure, sullenness, or discontent in the countenance; an angry frown.

6. (n.) Hence, gloom; dark or threatening aspect.

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