The number 9 in a dream represents the end. In a dream it means that something is ending or already has ended. A situation is now over or will never happen again.
Example: A man dreamed of seeing a girl walking into a house with the number 9 on it. In waking life he finally realized that his chances of being with his ex-girlfriend were over as she had moved on.
Example 2: A woman dreamed of seeing the number 9. In waking life she was worried about the end of the world and began to make emergency preparations for food because she was afraid.