Quote Originally Posted by marnold
Only really expensive guitars will be one-piece. Even then, you might have a flame-maple top or something similar that will add at least one if not two extra pieces of wood. If you look at the back of the guitar at an angle in the light, you can sometimes tell where the seams are--at least if the guitar has a glossy finish.

And, as Tung said, it is solid as opposed to being a hollow body or made of plywood.
Remember those photoflame guitars that Fender made a few years ago? They laminated a "picture" of a solid piece of wood on top of a body made of several laminated pieces. They looked cool, but got discontinued after guitar players figured it out.

tung