Class Glossary

I was looking through this serendip blog (all the way back...) and thinking "this is a literacy class"...if we were to make a class glossary and define these terms, what terms would we choose? How would we define them/choose these definitions? Would there be multiple definitions?

I thought of this when I was still trying to figure out in my head how to define "literacy" - finding a definition for literacy was also part of my goals for my midsemester evaluation. I also thought of this when I was looking through the Gee reading,  remembering that I really didn't understand any of the terms - primary discourse vs dominant discourse, secondary discourse, literacy - because I felt he was using these terms to define his terms.

Class thoughts on this?