In Buddhism, samādhi (Pali / Sanskrit: समाधि) is mental concentration or composing the mind. It is one of three divisions of the Noble Eightfold Path.

In the Pāli canon of the Theravada tradition and the related Āgamas of other early Buddhist schools, samādhi is found in the following contexts:

In Buddhism, samādhi is traditionally developed by contemplating one of 40 different objects (mentioned in the Pali canon, explicitly enumerated in the Visuddhimagga), such as mindfulness of breathing (anapanasati) and loving kindness (metta).

Upon development of samādhi, one's mind becomes purified of defilements, calm, tranquil, and luminous. Once the meditator achieves a strong and powerful concentration, his mind is ready to penetrate and see into the ultimate nature of reality, eventually obtaining release from all suffering.

In AN IV.41, the Buddha identifies four types of concentration development, each with a different goal:

The Buddhist suttas mention that samādhi practitioners may develop supernormal powers (abhijna, cf. siddhis), and list several that the Buddha developed, but warn that these should not be allowed to distract the practitioner from the larger goal of complete freedom from suffering.

Samadhi (Sanskrit: समाधि) in Hinduism, Buddhism, Jainism, Sikhism and yogic schools is a higher level of concentrated meditation, or dhyāna. In the yoga tradition, it is the eighth and final limb identified in the Yoga Sūtras of Patañjali.

It has been described as 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 while the person remains conscious. In Buddhism, it can also refer to an abiding in which mind becomes very still but does not merge with the object of attention, and is thus able to observe and gain insight into the changing flow of experience.

In Hinduism, samādhi can also refer to videha mukti or the complete absorption of the individual consciousness in the self at the time of death - usually referred to as mahasamādhi.

Samadhi (समाधि samādhi, Hindi pronunciation: [səˈmaːd̪ʱi]) is the state of consciousness induced by complete meditation. The term's etymology involves "sam" (together or integrated), "ā" (towards), and "dhā" (to get, to hold). Thus the result might be seen to be "to acquire integration or wholeness, or truth" (samāpatti). Another possible etymological analysis of "samādhi" is "samā" (even) and "dhi" (intellect), a state of total equilibrium ("samā") of a detached intellect ("dhi").

Buddhism is a religion and philosophy indigenous to the Indian subcontinent and encompasses a variety of traditions, beliefs, and practices largely based on teachings attributed to Siddhartha Gautama, who is commonly known as the Buddha (meaning "the awakened one" in Sanskrit and Pāli). The Buddha lived and taught in the eastern part of Indian subcontinent some time between the 6th and 4th centuries BCE. He is recognized by Buddhists as an awakened or enlightened teacher who shared his insights to help sentient beings end ignorance (avidyā), craving (taṇhā), and suffering (dukkha), by recognizing dependent origination and sunyata, and attain Nirvana.

Two major branches of Buddhism are recognized: Theravada ("The School of the Elders") and Mahayana ("The Great Vehicle"). Theravada has a widespread following in Sri Lanka and Southeast Asia. Mahayana is found throughout East Asia and includes the traditions of Pure Land, Zen, Nichiren Buddhism, Tibetan Buddhism, Shingon, Tiantai (Tendai) and Shinnyo-en. In some classifications, Vajrayana—practiced mainly in Tibet and Mongolia, and adjacent parts of China and Russia—is recognized as a third branch, while others classify it as a part of Mahayana. There are other categorisations of these three Vehicles or Yanas.