smile

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A facial expression characterized by an upward curving of the corners of the mouth and indicating pleasure, amusement, or derision.
2. n. A pleasant or favorable disposition or aspect.
3. v. To have or form a smile.
4. v. To look with favor or approval: Fortune smiled on our efforts.
5. v. To express cheerful acceptance or equanimity: We smiled at the bad weather and kept going.
6. v. To express with a smile: Grandmother smiled her consent.
7. v. To effect or accomplish with or as if with a smile.

Century Dictionary and Cyclopedia

1. To show a change of the features such as characterizes the beginning of a laugh; give such an expression to the face: generally as indicative of pleasure or of slight amusement, but sometimes of depreciation, contempt, pity, or hypocritical complaisance.
2. To look gay or joyous, or have an appearance such as tends to excite joy; appear propitious or favorable: as, the smiling spring.
3. To drink in company.
4. To ferment, as beer, etc.
5. To express by a smile: as, to smile a welcome; to smile content.
6. To change or affect (in a specified way) by smiling: with a modifying word or clause added.
7. To smile at; receive with a smile.
8. n. An expression of the face like that with which a laugh begins, indicating naturally pleasure, moderate joy, approbation, amusement, or kindliness, but also sometimes amused or supercilious contempt, pity, disdain, hypocritical complaisance, or the like. Compare smirk, simper, and grin.
9. n. Gay or joyous appearance; an appearance that would naturally be productive of joy: as, the smiles of spring.
10. n. Favor; countenance; propitiousness: as, the smiles of Providence.
11. n. A drink, as of spirit, taken in company and when one person treats another; also, the giving of the treat: as, it is my smile.

Wiktionary

1. n. A facial expression comprised by flexing the muscles of both ends of one's mouth while showing the front teeth, without vocalisation, and in humans is a common involuntary or voluntary expression of happiness, pleasure, amusement or anxiety.
2. v. transitive or (intransitive) To have a smile on one's face

GNU Webster's 1913

1. v. To express amusement, pleasure, moderate joy, or love and kindness, by the features of the face; to laugh silently.
2. v. To express slight contempt by a look implying sarcasm or pity; to sneer.
3. v. To look gay and joyous; to have an appearance suited to excite joy
4. v. To be propitious or favorable; to favor; to countenance; -- often with on.
5. v. To express by a smile
6. v. rare To affect in a certain way with a smile.
7. n. The act of smiling; a peculiar change or brightening of the face, which expresses pleasure, moderate joy, mirth, approbation, or kindness; -- opposed to frown.
8. n. A somewhat similar expression of countenance, indicative of satisfaction combined with malevolent feelings, as contempt, scorn, etc.
9. n. Favor; countenance; propitiousness.
10. n. Gay or joyous appearance.

WordNet 3.0

1. v. change one's facial expression by spreading the lips, often to signal pleasure
2. v. express with a smile
3. n. a facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement