What does reverse lexicographic order mean?

Question

What does reverse lexicographic order mean?

I met it when learning about Graded reverse lexicographic order. Here is the definition:

Graded reverse lexicographic order (grevlex, or degrevlex for degree reverse lexicographic order) compares the total degree first, then uses a reverse lexicographic order as tie-breaker

But I was not able to find a definition for a reverse lexicographic order.

Answer 1

To continue exactly at the point you ended your quote:

but it reverses the outcome of the lexicographic comparison so that lexicographically larger monomials of the same degree are considered to be degrevlex smaller