Everyone's getting in to the FAQ business these days. That's a hard question.
Postmodernism is a philosophy that is used to look at the world in a new way.
The goal is to become aware of some unspoken assumptions in the way that everyone sees the world. Postmodernism is similar. It attempts to get you into a frame of mind that allows you to see our world in a different way. Riki Anne Wilchins has a funny definition of postmodernism. Well, that's also a hard question.