To dream of dune represents feelings about the possibility of being trapped in a situation where nobody cares about you. Feeling trapped in a situation where you are wasting your time.
Example: A man dreamed of seeing stampeding animals being trapped in a sand dune. In waking life he was experiencing problems at work that might end up getting him fired. He was concerned that quitting his job and looking for another job might leave him worse off than before with no job at all. He was worried that he’d look unloyal to his current employer and unable to come back if he couldn’t find secure prospects for other employment. He felt he’d get trapped in unemployment with nobody wanting to hire him.