Knife
A knife stands for decisiveness and cutting off. Obtaining a sharp one means authority and drive arriving, and cutting something with it reads as finally doing the clearing you postponed. A dull blade signals a decision you keep deferring. Being cut is startling, yet tradition sometimes read the sight of blood as wealth instead. If the fear of being chased was strong, though, look at a relationship weighing on you.
A knife has its edge on one side only, so the hand and the thing it meets are settled before it is ever used. Traditional reading took a keen blade as authority and drive, while being wounded read differently. Seeing blood, though, is one of the symbols tradition turns on its head into wealth.
Readings by Situation
Gaining a keen blade
A good sign that authority and the force to push ahead arrive. Tradition read a sharp edge as decisiveness. If you have a decision deferred, this is a good time to make it.
Cutting something with a knife
A sign of severing what needs severing. Tradition read cutting away as tying something off. It reads as a long-running tie or task being settled.
Being cut and bleeding
Traditional reading treats blood as wealth and took this as a good omen. That said, if the fear in the dream was strong, it also reads as a relationship that weighs on you. Which of the two it was is told by how you felt on waking.
A blunt knife, or losing one
A sign that you cannot bring yourself to decide. Tradition read a dulled edge as a time of flagging strength. Seeing what makes you hesitate brings the answer closer.
Knife dreams do not forecast accidents or fights. They are usually scenes drawn by facing something that has to be cut away. Even blood is read as wealth in tradition, so there is no need to be alarmed.