What is a cordial wine?

Answer 1

I don't know if this is the answer you're looking for, but I've made wines using fruit cordial that I've fermented. Some have been very good!

or

they are pleasant wines, with no salient features, easy to drink for anybody.

Answer 2

A cordial glass may also be called a liqueur glass. This is a small stemmed glass (looks like a mini wine glass) generally used for after dinner drinks or dessert wines and spirits. At times they are also used for aperitifs