A frown (also known as a
scowl) is a facial expression used to
indicate displeasure, or disapproval.
The appearance of a frown varies from culture to culture.
Although most technical definitions define it as a wrinkling of the
brow, in the USA it is primarily thought of as an expression of the
mouth. In those cases when used iconically, as with an emoticon, it is entirely presented as a curve of the
lips facing away from the eyes ('down').
It most commonly expresses sadness, dissatisfaction, anger, worry or pain.