What does it mean to dream about piano?
A piano usually stands for skill practised over time and the harmony or discord you feel, so it helps to ask whether you could play it or sat before it lost.
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 keyboard and the touch of the hands as a refined image of pleasure and mastery, the wish to perform and please. Stumbling over the keys can carry old anxiety about being judged.
After Freud, The Interpretation of Dreams (Brill trans., 1913), public domain.Jung
Jung might see the piano's range as the many notes of the self brought into one order, harmony sought between high and low. Playing in tune can mark a moment of inner balance.
Jungian concept (our summary).Modern
Continuity ties a piano to waking thoughts about practice, competence, and performing under eyes. Forgetting a piece you once knew often echoes a real worry about skills slipping away.
Continuity hypothesis (our summary).Mythological
Music as ordered harmony runs deep in myth and lore, where the right notes were thought to echo the order of the heavens themselves. To play well was to touch something larger than the room.
Rosmerta Publishing editorial synthesis (after Bulfinch; Brewer).