Definition of frowns:
(n) :
A wrinkling of the forehead with the eyebrows brought together, typically indicating displeasure, severity, or concentration.
(n) :
(Canada, US) A downturn of the corners of the mouth, typically expressing sadness.
(n) :
Any facial expression that indicates disapproval or displeasure.
(v) :
(intransitive) To have a frown on one's face.
(v) :
(intransitive, figurative) To manifest displeasure or disapprobation; to look with disfavour or threateningly.
(v) :
(transitive) To repress or repel by expressing displeasure or disapproval; to rebuke with a look.