Red describes itself as functional imperative. I used to use Red as an example of what programming could be when people try to ham fist declarative extremism on me. Seeing the words imperative and functional used together with examples would silence most of the nonsense.

It is difficult to pin down how to describe it. It is homoiconic as well like lisp (at least the scripting part of Red), but seems to be used in some kind of functional imperative style.