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. [1]
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. [2]
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. [3]
2. To try and fool someone with an outward appearance.
3. To show kindness Prov. 18:24 [6]