DSLR = Digital Single Lens Reflex
SLR cameras are designed for high-end work, and as Epsilon mentioned, the lens is often sold separately, indeed as the price of the camera body goes up, you're expected to pay for the lens separately. The lens is the most expensive component, however its likely to last you a lifetime even as technology changes and you upgrade your camera body.
Lenses often cost much more than the camera body alone. Even second hand lenses fetch a fairly hefty price. This is why I cannot really do much with photography, I can't afford the lenses to take it to the next level.
