To see a vacuum in your dream refers to feelings of emptiness. You may be experiencing a void in your life. Alternatively, the dream indicates that you need to clean up your act and your attitude. It is time to rid yourself of your outdated ideas and negative habits.
To dream that you are vacuuming signifies a loss of control. You feel that you are being sucked up by some problem. Alternatively, the dream represents your desires to keep up appearances. Things may look fine on the surface, but some problem still persists underneath.
To dream of a scientific vacuum or "vacuum in space" represents feelings a situation staying the same indefinitely. Emotional emptiness that purposely disallows anything else to happen in a situation at all.
A vacuum may reflect powerful jealousy, guilt, bitterness, or anger that is obsessed with sterilizing all progress some area of your life. Unhappiness that wants nobody else happy either. Feelings about stasis you can't do anything about.
Alternatively, a scientific vacuum may reflect feelings about a vacated area of your life causing powerful influences.
To dream of a vacuum cleaner represents your preoccupation or motivation to finally deal with problems. Noticing things going away. Being proactive or solution oriented. Cleaning up your act or attitude. A focus on finality or getting something cleared up. Noticing negativity or problems having to go away. Ridding yourself of outdated ideas and bad habits. Tidying up your life.
To dream of a broken vacuum cleaner represents your lost motivation or ability to tidy up some area of your life. Feeling that it's not possible to have the perfectly responsible or professional appearance that you want.
Example: A man dreamed of using a vacuum cleaner. In waking life he finally got to tackle a number of issues that he had previously been too distracted to deal with. He was very motivated to do so.