What Does Dreaming of Joy Mean?
Traditional Interpretation
In the Turkish-Islamic tradition of dream interpretation (Ibn Sirin, al-Nabulsi), seeing joy can mostly indicate an approaching good, glad tidings, the lifting of hardships, and ease of heart. Some interpreters say that unmeasured or causeless joy may also signify a small sorrow to follow, or a call to stay alert against the heedlessness of the self.
Psychological View
From the standpoint of modern psychology, joy felt in a dream can be the emotional reflection of desires accumulating in the subconscious, of a suppressed need for happiness, or of a recent success. This feeling can indicate that the person is moving toward inner balance, and that a need for fulfillment and affirmation in waking life is seeking to be met.
By Context
For Singles
For a single person, feeling joy in a dream can indicate an auspicious acquaintance, a bond of the heart, or news that will soon bring a smile to their face.
For Married People
For a married person, joy in a dream may signify peace within the family, growing affection between spouses, or awaited glad tidings — such as abundance or a birth.
Causeless / Unmeasured Joy
Rejoicing wildly without knowing why may be interpreted by some commentators as a passing delight followed by a small disappointment, or as a warning against growing too attached to the world.
According to Ibn Sirin, Sharing in Another's Joy
Sharing another person's joy, or seeing them rejoice, can indicate a shared good on its way, friendships growing stronger, and unity of heart.