By dinner I assume you mean the noon meal. In the South the meals are breakfast, dinner and supper. A good friend and I have a running argument about that. Don't know what I will have for supper due to the fact that I have to get 3 teeth pulled today in preparation for a new bridge.
I'm not arguing with the accuracy of your statement; however, they are, erroneously or not, used so interchangeably for many. For a lot of us coonazzes, it's breakfast, lunch and dinner/supper. As far as your teeth, pull 'em all and get the dentures........SabanFan loves his. :grin:
In my younger days I would show up way too early when someone invited me to dinner. It was breakfast, dinner, supper for me.