Someone who is uncultured is ignorant, uneducated. They often have no understanding of worlds and lives outside their own.
Some believe that what really separates man from beast is culture, the desire to learn about and understand the relationship between people and the surrounding world, the need to form communities, make art and play games. If you're a cultured person, you visit museums, attend concerts, read books. You are interested in the world, and open to new experiences and ways of looking at things. If you're uncultured, you do none of those things.
