In his book Gospel in Life, Timothy Keller puts the concept of worldviews into a language that we can understand. In short, a worldview is a way of looking at the world in which there is a purpose, a problem and a solution.
Worldviews are organized in several categories, Keller says, based on what people see as the purpose, the problem and the solution to our human condition in life.
The traditional religious cluster of worldviews includes Platoism and many traditional religions. The purpose in this worldview is to know and live in accord with the perfect realm of ideals. The problem is that the soul is good but the body is bad. The solution is to make ourselves good and virtuous people.
