Dewpoint is "absolute" humidity, and it's expressed in degrees. I like it because it's much more closely related to comfort level than relative humidity. We've always heard about relative humidity because it's easier to measure.

If the dewpoint is below 50ºF, it's "dry" out and very comfortable.
Dewpoint from 50-60 is starting to get muggy, but not too bad.
60-70 is really muggy.
70 and above is what I think of as "Floridian".