# Terminology: what is a (re)grade

I the article Foundations of Inference by Knuth and Skilling terms "grade" and "regrade" appear, apparently applied to an $\mathbb{R} \mapsto \mathbb{R}$ function (named $\Theta$ in the article). Basic search on wikipedia/google didn't return much.

So my question is what are the definitions of "regrade" and "grade".

Disclaimer: I'm not native English speaker.

• That's Kevin Knuth. Aug 9 '18 at 7:45
• @LordSharktheUnknown is this a suggestion on attribution formatting? Aug 10 '18 at 12:10