What does mornay sauce mean in cooking?

mornay sauce means: Basic bechamel sauce, to which you can add cheese. You can add eggs or stock to make it more flavorful. (in Cooking Dictionary)

What else does mornay sauce mean?

This sauce is similar to the bechamel sauce, but it contains Gruyere cheese and sometimes has egg yolks. This sauce is most commonly used for vegetable and fish preparations. (in Cooking Dictionary)