My xrays show a highly displaced vertabrae. what exactly does this mean?

It depends: I do not have enough information from the report to draw definitive conclusions. A highly displaced vertebra could indicate at your age that you have a 'compression fracture' (collapse) or it could mean that the vertebra is displaced vertically in some way. It all depends on what vertebra we are talking about, the mechanism of injury, the physical exam and a more detailed report.

Vertebrae: Not a routine terminology in radiology. It might mean malalignment between the vertebrae.

Spondylolisthesis: Possibly. It depends, but any vertebrae that is highly displaced can threaten the spinal cord and should be assessed by neurosurgery. A grade 3 or 4 spondylolisthesis may need surgery and needs to be examined sooner than later. Do not let any one perform manual manipulation before thorough assessment by neurosurgery.

May be nothing: This may have been there all your life. It depends on where it is and if you have symptoms. You may have a condition called spondylolisthesis for one vertebra has slid forward on the other. This is a problem only if it's causing a problem.

Spine shift: The vertebrae are the spine bones. There are spaces with softer cushions -called discs between these noes. Herniated disc is when one fails. Spine slippage can occur from trauma, aging, and some other congenital or acquired diseases. Lumbar spondylolisthesis is such a slippage. They can be painful or even paralysing-so be evaluated.