Dreaming of an argument means you are mentally preparing for a real confrontation with your adversary. Take away strong points from the dream to enhance your arsenal of words and strategies against your opponent. Always try to maintain your cool, because the argumentative dream may at the end put everything out of proportion and creates more conflict than necessary.
There are many causes for arguments in dreams such as if you have been awake for too long or not getting enough sleep, stress from work and school, or unresolved issues from your waking life.