Dream about large knife is an omen for boundary between your conscious and subconscious. Your desires will be soon be realized. You need to be refreshed or rejuvenated. It is an indication for your need for organization and order. You need to carefully examine what you are getting into.
Large knife dream points to some sort of realization enlightenment. You are trying to hide something from the world. You need to recognize the dangers or negatives of some situation. This is a sign for victory. Perhaps you regret something you did.
If you dreamt about large knife:
Take time to understand the perspective on the other side of the fence. When you seek first to understand the situation from all angles, the solution will become much more clear than if you only see it from your own limited perspective.