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.