A very open-ended question, i.e. what is meditation and who is doing the meditating?
Sounds like you're evading the question.
The term can include very diverse methods, practices, approaches; slowing or silencing the mind, watching the breath, objectless awareness, focus on a name, image or divine quality, self-inquiry that traverses ego-mind's essential nothingness, meditation of the heart, etc.
You mentioned self-inquiry...
Meaning, in this context, looking at the question of who is actually meditating. Is it ego-mind in sheep's clothing or has one cultivated a new center of being, a new base of operation from which to launch this new enterprise, this so-called journey of awakening.
So what's your own perspective about meditation?
Basically a practice of standing still, of getting rooted in the midst of mind's constant torrent to avoid getting swept downstream. What can follow is an intensified state of remembrance, and a sensation of being readjusted, reconstructed, of generally being reshaped. You could call it a purification process decreasing ego-mind's resistance and interference, eating away at its barriers to change.