Judy, its where one pattern has been changed by altering the lettering symbol or whatever to make a new pattern, and then when you look at the product, such as a skillet, you can still see a faint or ghostlike image of parts of the old pattern that have come through on the skillet, even though these parts weren't supposed to be seen on the new product, because the whole idea of altering the pattern was to cover up or change it a part of it.
I guess you could actually say its a failure then, because you ain't supposed to see what you are seeing, which is the ghost image.
Have I got you totally confused yet?
Some of the skillets you can readily see the ghost in is Wapak. Wapak took a griswold pattern and altered it so they could make a Wapak skillet, but on a lot of Wapak skillets you can see parts of the Griswold logo, even though it clearly says Wapak.