To have (a smile) on one's face.
To express by smiling.
To express amusement, pleasure, or love and kindness.
To be propitious or favourable; to countenance.
To look cheerful and joyous; to have an appearance suited to excite joy.
Favour; propitious regard.
A facial expression comprised by flexing the muscles of both ends of one's mouth, often showing the front teeth, without vocalisation, and in humans is a common involuntary or voluntary expression of happiness, pleasure, amusement, goodwill, or anxiety.