Predatory cats usually represent your ability to protect your best interests as well as your ability to go out on the prowl and get what you want in life. A threatening tiger can mean you are fearful of utilizing this assertive side of yourself. A friendly tiger would suggest you are comfortable with this assertive, hunter part of you.
Tigers can also symbolize feminine sexual energy. But you should also apply your own associations with tigers to your dream. Do they remind you of someone or of a place? Does that person or place hold relevance to you right now? How would you describe a tiger to someone who didn’t know what a tiger was? Does your description seem similar to you or to someone around you that you have been dealing with lately?