Smile
Conscious or unconscious facial muscular movement conveying happiness or pleasure / From Wikipedia, the free encyclopedia
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This article is about the facial expression. For other uses, see Smile (disambiguation) and Smiles (disambiguation).
A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile. Among humans, a smile expresses delight, sociability, happiness, joy, or amusement. It is distinct from a similar but usually involuntary expression of anxiety known as a grimace. Although cross-cultural studies have shown that smiling is a means of communication throughout the world,[1] there are large differences among different cultures, religions, and societies, with some using smiles to convey confusion, embarrassment or awkwardness.