What does it mean to dream about cage?
A cage often points to confinement and a feeling of being trapped or of trapping something, so notice whether you were inside it, outside, or holding the door.
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 the cage as the confinement of an instinct or a wish, the wild thing shut away for safety's sake. Being caged can carry the strain of a desire penned in against its nature.
After Freud, The Interpretation of Dreams (Brill trans., 1913), public domain.Jung
Jung might see the cage as a part of the self held captive, a vital force shut behind bars. The caged creature can stand for an instinct you have locked away and that longs to be free.
Jungian concept (our summary).Modern
Being trapped in a cage sets off the brain's rehearsal of confinement and the urge to escape, keeping you alert to a loss of freedom. The penned feeling often mirrors a real sense of being stuck or hemmed in.
Threat-simulation theory (our summary).Mythological
The captive in the cage runs through myth as the prisoner held for ransom or sacrifice and the caged bird whose song is grief itself. To be caged was to be cut off from one's own nature and home.
Rosmerta Publishing editorial synthesis (after Bulfinch; Brewer).