Zen means no separation.

As you know, there are many types of meditation.  Originally, the word Zen means meditation.  It means unending awareness, an absolute state of presence.  It can include: focus, expansion, stillness, aliveness, alignment, balance, clarity, joy, ease.  State of consciousness is primary, everything else is secondary.  Meditation may have a flavor.  It is ultimately centering solidly within Love.

Zazen       seated meditation, being very present
Shikantaza       just sitting
Kinhin       walking meditation
Suizen       blowing Zen, shakuhachi meditation
Big Breathing Bamboo       breath, bamboo and sound meditation; wide-bore jinashi; heightened awareness of subtle perception, resonance and plant consciousness; deep breath cultivation

Deep breath, clear mind.