Graduation dreams are common well beyond people actually in education, because the symbol maps onto any completed phase of learning or growth — a milestone marking that a chapter of development is genuinely finished.
A joyful, successful graduation
Reflects genuine recognition — even if only internal — that you've completed a significant phase of growth or learning, whether that's a literal course, a difficult life period, or a personal skill.
Failing to graduate or missing the ceremony
A common anxious version, this often reflects a fear that a phase of growth you thought was complete actually isn't — impostor syndrome about whether you've genuinely "finished" learning something.
Graduating from something unexpected (not school)
Can reflect completing an unconventional but real form of growth — processing a difficult relationship, recovering from a setback — that deserves to be marked as an accomplishment even without a formal ceremony.