Samadhi

Samadhi (Sanskrit: ) is a Hindu and Buddhist term that describes a non-dualistic state of consciousness in which the consciousness of the experiencing subject becomes one with the experienced object, and in which the mind becomes still (one-pointed or concentrated) though the person remains conscious. Sahaj samadhi is the effortless and continual state of perfection of a satguru. It varies from technical terms used to describe the higher levels of concentrated meditation, or dhyana (alt. "jhana"), in Yogic schools, and is considered a precursor for enlightenment, or Nirvana, in Buddhism. It is the eighth and final limb of the Yoga Sutra of Patanjali, and comprises the pinnacle of achievements in Samyama, the three-tiered practice of meditation including also dharana and dhyana.
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Samadhi (Sanskrit) [from sam with, together + a towards + the verbal root dha to place, bring] To direct towards; to combine the mental faculties towards an object. Self-consciousness union with the spiritual monad by intense and profound spiritual contemplation or meditation. It implies "the complete abstraction of the percipient consciousness from all worldly, or exterior, or even mental concerns or attributes, and its . . . becoming the pure unadulterate, undilute super-consciousness of the god within. . . . Samadhi is the eighth or final stage of genuine occult Yoga, and can be attained at any time by the initiate without conscious recourse to the other phases or practices of Yoga enumerated in Oriental works, and which other and inferior practices are often misleading, in some cases distinctly injurious, and at the best mere props or aids in the attaining of complete mental abstraction from worldly concerns" (OG 150-1). The seeker on attaining samadhi becomes practically omniscient for his solar universe because his consciousness is functioning in the cosmic spiritual and causal worlds.
Bodhi (enlightenment) is a particular state of samadhi, during which the subject reaches the culmination of spiritual knowledge. Samadhi is the highest state on earth that can be reached while in the body; its highest stage or degree is called turiya. To attain beyond this, the initiate must have become a nirmanakaya.

A form of meditation widely practiced in Theravada Buddhism in which the mind is concentrated on a single object and gradually calmed until only the object is known. The ultimate goal of this meditation is to enter the state of samadhi which is when the distinction between the object and the meditator disappears, which is the realization of non-dualism. This state is a prerequisite to entering the four levels of jhana and enlightenment.

The eighth and final stage of meditation in raja yoga in which a person's mind realizes the Ultimate Reality.

STATO DI CONTEMPLAZIONE MISTICA IN CUI SCOMPARE LA DISTINZIONE TRA IL SÉ E IL MONDO CIRCOSTANTE [INDUISMO]