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 or anxiety.
He always puts a smile on my face.
Favour; propitious regard.
the smile of the gods
A drink bought by one person for another.
To have (a smile) on one's face.
I don't know what he's smiling about.
To express by smiling.
to smile consent, or a welcome
To express amusement, pleasure, or love and kindness.
To look cheerful and joyous; to have an appearance suited to excite joy.
The sun smiled down from a clear summer sky.
To be propitious or favourable; to countenance.
The gods smiled on his labours.