Being cheerful is always a beloved state. For this reason, cheerfulness in a dream is a sign of goodness and good fortune. It signifies obedience to Allah and His Messenger. For those who mock and rebel, cheerfulness is a sign of heedlessness, of the unlawful, and of inclining toward those who consume unlawful things and toward people of innovation.
Seeing a dead person cheerful and merry signifies that the person is accepted before Allah Most High. Some have said: Seeing oneself laugh in a dream is interpreted as sorrow and grief. If one laughs out loud, the distress and grief will be even more severe. Kirmani said: Seeing oneself laugh with a smile signifies joy and attaining one's wish. It has also been said: Laughing with a smile in a dream is a sign of relief and joy. Laughing out loud in a dream signifies weeping.
Seeing oneself laugh in a certain place signifies that there will be abundance and low prices in that place.
Seeing a dead person laughing signifies the beauty and happiness of that person's state in the hereafter.