To dream of octopus represents an aspect of yourself that is possessive or clingy. All-consuming or smothering behavior. It may also reflect your own need to control a person or situation in multiple ways. You or someone else that wants to control every little thing another person does. Over-mothering.
Positively, an octopus may reflect multiple ways to hold or influence people. A large number of different areas of your life you are controlling at once. Success or power that allows you to controlling everything around you.
Example: A man dreamed of seeing an octopus. In waking life he was thinking about his ex-girlfriend who was very needy and possessive. The octopus reflected how his ex used to want control over ever single thing he did.
Example 2: A young woman dreamed of climbing an octopus mountain. In waking life she was trying her hardest to overcome her powerful jealousy of her boyfriend being around other girls when he went on vacation. The octopus mountain reflected how hard it was for her to resist the need to know everything about her boyfriend at all times.
Example 3: A young child dreamed of their mother turning into a black octopus. In waking life they felt that their mother was too controlling and involved in every aspect of their lives.
Example 4: A young girl dreamed of an octopus blocking a door that would allow her to go outside to play with some boys. In waking life she felt that her mother was totally controlling her life to stop her from having sexuality activity.