Manifest Content, Latent Meaning
Freud proposed every dream has two layers: manifest content (what you see) and latent content (what it "really" means). The dream acts as disguise — transforming unacceptable wishes into symbolic imagery through condensation, displacement, and symbolization.
Dreams are wish fulfillment — specifically, the disguised fulfillment of repressed wishes. The "dream-work" transforms these into imagery the conscious mind can tolerate.