What does it mean to dream about dragon?
A dragon usually pictures a great power or fear, a hoard to be won or a force to be faced, the obstacle that guards the treasure.
Four ways to read it
Each reading below comes from a named tradition and a cited source, so you can see where it came from and decide what fits your dream.
Freud
Freud would read a fearsome drive or a forbidding figure, the power that blocks the wish and must be overcome.
After Freud, The Interpretation of Dreams (Brill trans., 1913), public domain.Jung
Jung would see the guardian of the treasure and the devouring unconscious, the monster the hero must face to claim the self.
Jungian concept (our summary).Modern
Continuity and the threat-simulation idea tie the dragon to waking fears and the great challenges the dreamer feels they must master.
Threat-simulation theory (our summary).Mythological
The dragon coils through every mythology, the Norse Fafnir on his gold, the chaos-serpent of the deep, the lucky celestial dragon of China, terror and treasure together.
Rosmerta Publishing editorial synthesis (after Bulfinch; Frazer).