To experience a gradually increasing feeling of anger or frustration; to slowly burn.
To manifest displeasure or disapprobation; to look with disfavour or threateningly.
To repress or repel by expressing displeasure or disapproval; to rebuke with a look.
To communicate by frowning.
To have a frown on one's face.
A downturn of the corners of the mouth, typically expressing sadness.
A wrinkling of the forehead with the eyebrows brought together, typically indicating displeasure, severity, or concentration.