Complete Dictionary of Dreams

by Dr. Mıchael Lennox
A smile is a reflex that is connected directly to feeling a sense of joy. Sporting one is a contagious experience, and when one person smiles, it often sparks a smile in another. In this way, the symbolism of smiling relates to both of these notions: that joy is present in abundance and that when it is felt and processed, it can spread with ease.

If you are smiling in a dream, then you are expressing an overflow of joy or the need and desire for more of it.

If someone in your dream is smiling, consider the character aspect of your personality that the person represents and understand that that area of your personality has the capacity to increase your joy quotient.

The Big Dictionary of Dreams

by Martha Clarke
The dream could be expressing your approval with respect to decisions that you have made.

It is possible that you feel satisfied with your successes and achievements. The future will bring you happiness, you should seize it.

Perhaps the dream is telling you to smile a little more. An Indian guru named Paramahansa Yogamanda in his book titled The Search for Eternity encouraged his readers to make millions of smiles, as in front of others the face is very contagious.

New American Dream Dictionary

by Joan Seaman - Tom Philbin
1. If one is smiling warmly, he/she is satisfied with achieve­ments.

2. If someone is smiling warmly at the dreamer, that person is satisfied with the dreamer’s achievements.

3. If some­one is smiling sarcastically, then the feeling is critical.