If you dream about an argument, you may have conflicting feelings about something.
You may be releasing negative feelings that you are unable to express in waking life.
You might be remembering times during your childhood when your parents were fighting and you couldn’t do anything about it?
If you are having an argument with someone in your dream, the identity of the person you are arguing with can provide a clue as to what the dream means.
You may experience hostility toward that person in real life, or you may have an unconscious aversion to them.
On the other hand, the person you are arguing with may represent an aspect of yourself. This is especially likely if you are arguing with someone you don’t know.
An argument in a dream may also simply represent a dispute that you are having in waking life.