DICT.TW Dictionary Taiwan

 Scowl v. i. [imp. & p. p. Scowled p. pr. & vb. n. Scowling.]
 1. To wrinkle the brows, as in frowning or displeasure; to put on a frowning look; to look sour, sullen, severe, or angry.
    She scowled and frowned with froward countenance.   --Spenser.
 2. Hence, to look gloomy, dark, or threatening; to lower. “The scowling heavens.”