To dream about a knife - the bad sign. The knife symbolizes quarrels, partings, failures in business. A rusty knife - the sign of dissatisfaction. A knife with a sharp blade - a symbol of concern and chagrin. Be afraid of enemies. The broken knife means defeat. If in a dream put you knife wound, then in reality you will be upset because of disobedience of children. If dreamed you that you wounded someone a knife, then in reality you risk to make a base act.
Be sure and keep any other thoughts out of your mind before drifting to sleep as a cluttered mind can decrease the chances that you will remember your dreams upon waking. Also, focusing on remembering your dreams upon waking in the morning is another very important thing. This sounds very easy, but is often hard for some to do. Interpret a dream by "dictionary dream of interpretation"
When you very first wake up, simply think about your dreams. Don't allow your mind to drift off to other things, just lay there and think about the things you dreamt about the night before - dictionary dream meaning.