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Quaternary refers to the fourth of/in class. It follows primary, secondary, and tertiary.
Ron: "Hey Bill, I'm just about to get my quaternary education!"
Bill: "Ron, you fool! There is no quaternary education! Nothing comes after college!"
Ron: "I am talking about the meaning of life!"
Bill: "So you are dying then?"
Ron: "Yes."
Bill: "Ok then, bye."
by DuBois March 19, 2006
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