1. Look angry or sullen, wrinkle one's forehead, as if to signal disapproval
   "He frownd at the messenger";
   - glower, lour, lower[2]

1. A facial expression of dislike or displeasure
   "His frown suggested disapproval";
   - scowl, lower[2], lour

Derived forms: frowning, frowned, frowns

Type of: facial expression, facial gesture, grimace, make a face, pull a face [informal]

Encyclopedia: Frown