In the interpretation of dreams, Sun is among the recurring images that traditional dream-books and modern depth psychology have alike tried to read. It is commonly interpreted as consciousness, vitality, the self, clarity, and success.
Common readings
The sun is generally read as consciousness, vitality and the clear light of day, and as an emblem of the integrated self and of success.
The reading of dream symbols has a long documented history, from the Oneirocritica of Artemidorus in the second century to Sigmund Freud's The Interpretation of Dreams (1900) and the archetypal psychology of C. G. Jung. Such meanings are interpretive conventions of those traditions, offered here as ways the image has been understood rather than as fixed or established fact; in practice a symbol takes much of its sense from the individual dreamer and the setting of the dream.
Solar imagery carries an unusually dense weight of attributed meaning outside dreams specifically, from sun-deity worship across numerous unrelated ancient religions to Jung's own use of the sun as a recurring image of the Self, the archetype of psychic wholeness and integration, discussed at length in his later writing on alchemical and mandala symbolism. A dreamed sun inherits this broader cultural and psychological weight rather than carrying one settled meaning of its own within dream interpretation specifically. Artemidorus, characteristically, resists any single reading: he treats a dreamed sun's significance as dependent on the dreamer's own status and on the sun's apparent condition, whether bright, obscured or unusually positioned, in the dream itself.