1. Showing displeasure or anger
   "She saw the frowning man in a wool coat"

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

See also: displeased

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

Encyclopedia: Frowning