The word "meditation" is ill defined, which means there are disagreements of what is or isn't meditation. And even if it was not, there are a lot of different methods indeed.
Hm, you have yoga, qigong, transcendental ... Some systems you just sit normally on a chair, some forms of yoga you have very weird positions, some you stand, in taichi you move around
Then there is "what to do with the mind": Some use music, some focus on a word, some just "try to quiet the mind" ... There really is too much variation to mention here
