dhyana

n. (Buddhism, Hinduism) practice of deep meditation which is the second to last stage of yoga for attaining enlightenment

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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Dhyana (Sanskrit) [from the verbal root dhyai to contemplate, meditate] Profound spiritual-intellectual contemplation, with utter detachment from all objects of sense and of a lower mental character; one of the six paramitas in Buddhism. See also JHANA 

Another way of spelling jhana.

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