Jhana

Dhyāna in Sanskrit or Jhāna in Pāli refers to a type or aspect of meditation. It is a key concept in Hinduism and Buddhism. Equivalent terms are "Chán" in modern Chinese, "Zen" in Japanese, "Seon" in Korean, 'Thien" in Vietnamese, and Samten in Tibetan.
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Jhana (Pali) Meditation in wisdom, equivalent to Sanskrit jnana and dhyana. This experience was originally divided into four states: the mystic, with his mind free from sensuous and worldly ideas, concentrates his thoughts on some special subject such as the impermanence or mayavi character of all exterior things; uplifted above attention to externals and ordinary reasoning he experiences keen joy and quiet ease both of body and mind; the bliss passes away and he becomes suffused with a sense of inner completeness, in its higher stages approaching cosmic ranges; he becomes aware permanently of purest lucidity of intellect and perfect equanimity, while his consciousness realizes wisdom.

A jhanais one of the highest levels of awareness that can be reached by the practice of samadhi. There are four jhanas, which together essentially are enlightenment . This is where the monk attains supernormal powers, sees his past lives, and gains wisdom of the true character of reality.Enlightenment