TheRusty is talking about getting the feet/skis turned left (10:00 or whatever) while the body is pointed at 12:00.
Ott and Wiggs are talking about turning so far across the hill and maybe even somewhat uphill that you almost stall out.
Pat is talking about carving a loop/circle. (Wow! I wish I could do that.)
They are all talking about the same thing, more or less -- turning your skis all the way across the hill while skiing down.
@delta888, do you know how to get your skis to do this?
One thing that works real well for completing turns is to keep manually turning the uphill ski more than the downhill ski. Said another way, at the end of your turns, point the tip of your uphill ski uphill. While doing this, temporarily ignore the downhill ski. It will feel like you are turning that uphill ski more radically than your downhill ski. The feeling is deceptive. Putting your focus on turning the uphill ski waay uphill can bring your turns around and complete them.
There are some other things that might help you complete your turns effectively.
--You might be turning your upper body along with your skis, so that when they are pointed left, your shoulders and head are also pointed left. Do you do this? TheRusty was describing how to turn the feet independently of the upper body. Do that; it's real important.
--You might also be leaning your whole body inside the turn, aka banking your turns. Do you do this? Keep your upper body upright, not banked. There will be a sideways bend at your hips. This will bring enormous benefits.
All these things will bring you added control of your skis and help you shape your turns better.