What does over direction mean when cutting hair?

Over direction is when you direct sections of hair further over the head rather than straight out from the head. For instance if you have a side parting, instead of pulling the sections straight up I would direct the hair over to the other side of the head to meet the layers on that side. I was taught this method whilst hairdressing in a modern salon in Portsmouth but can't seem to get anyone else to understand it. If you have more hair on one side of the head because you have a side parting it stands to reason if you studied symmetry at school that the side with more hair will fall shorter if cut straight up when layering so you have to account for the fact that the hair must reach the same length as the other side. So all sections are taken right over to match in with the other side and when the hair falls it is the same length each side. Honest this method works well with long layers and keeps volume. it also works with short hair when you want the fringe to be longer.