Meditation means a lot of different things to a lot of people. It’s one of the most polysemantic words I can think of, beside maybe truth and good. I’m interest in more Buddhist Meditation, but I guess you ask again: which Buddhism? There are at least three traditions.
Anyway, I found that best way to go about working out the differences was by meditation practices, meditation how to I guess you could call it. The meditation how to approach to working out the meanings of the word “meditation” has been a very Pragmatic approach to the problem of polysemantics, though methodological issues still arise.