I would like for anyone reading this to think very hard about what your definitions of the following words and phrases are, and to leave a comment explaining your reasoning in as much detail as possible. Also, please compose your definitions in a text editor (Notepad, Textedit, etc.) BEFORE reading any comments responding to this post. This exercise will be much more interesting, I think, if the answers aren’t reactionary to something someone else wrote.

UPDATE: I added “moderate” and “centrist” to the list, since I thought of them and no one had written definitions yet.