The manual can be accessed from the help menu in the program. And there is a glossary,
and has been for a long time, in the support section.
Don't get me wrong, I would agree that the 'check the manual' response is a bit overused, and I try to reference the specific pages of the manual that pertain to the question whenever I can. But when so much effort has gone into providing these answers in advance, in writing up the manual, putting together video tutorials and all the other resources available in the support seciton of the site, its not always reasonable for new users to expect others to voluntarily look the stuff up for them. I totally understand that this isn't always the case, and sometimes the user has already tried to find the answer themselves. And I'm sure you would agree that there are quite a few users who try to take the time to properly answer even the simplest of questions.
The biggest problem I see with a 'newbie forum', which could very well serve a useful purpose, is that the posts that should end up in it wouldn't, and would be posted all over through the other forums. Its not a bad idea, and we'll have to see what the team thinks of it, but the moderators spend a fair bit of time trying to keep the support questions in the proper forums already. But then, that is what we are here for.