Dhyana (n.) is the root of the words ch'an and zen, and is badly served by "meditation" and worse by "trance"; better leave it untranslated, as we did Nirvana and Tao.
Dhyana (n.) is absent wherever there is purpose, seeking, or grasping for results.
Meditating (n.) is mostly noticing that you stopped.
Meditating (n.) is bringing the mind back to something again and again, as we always do, but directing it so as to break our cycle of meditating on ourselves and on our own problems, reinforcing our self-clinging.
Reflective meditation (n.) is sitting still long enough for the day to catch up with you.
Reflective meditation (n.) keeps bringing up the email you didn't answer.
Reflective meditation (n.) works like letting a snow globe settle before deciding what the scene is.
Reflective meditation (n.) looks identical to doing nothing, which is why it is the first thing cut from a day.
6 concepts in this list.