The noun smile has 1 sense (first 1 from tagged texts)
1. (29) smile, smiling, grin, grinning -- (a facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement)
Overview of verb smile
The verb smile has 2 senses (first 1 from tagged texts)
1. (79) smile -- (change one's facial expression by spreading the lips, often to signal pleasure)
2. smile -- (express with a smile; "She smiled her thanks")