The essentially pure nature of mind is obscured and afflicted by various psychological defilements, which destroy the mind’s peace and composure and lead to unwholesome deeds of body, speech, and mind, acting as causes for continued existence in saṃsāra. Included among them are the primary afflictions of desire (rāga), anger (dveṣa), and ignorance (moha). It is said that there are eighty-four thousand of these negative mental qualities, for which the eighty-four thousand categories of the Buddha’s teachings serve as the antidote.

Kleśa is also commonly translated as “negative emotions,” “disturbing emotions,” and so on. The Pāli kilesa, Middle Indic kileśa, and Buddhist Hybrid Sanskrit kleśa all primarily mean “stain” or “defilement.” The translation “affliction” is a secondary development that derives from the more general (non-Buddhist) classical understanding of √kliś (“to harm,“ “to afflict”). Both meanings are noted by Buddhist commentators.

A major śrāvaka disciple and personal attendant of the Buddha Śākyamuni during the last twenty-five years of his life. He was a cousin of the Buddha (according to the Mahāvastu, he was a son of Śuklodana, one of the brothers of King Śuddhodana, which means he was a brother of Devadatta; other sources say he was a son of Amṛtodana, another brother of King Śuddhodana, which means he would have been a brother of Aniruddha).

Ānanda, having always been in the Buddha’s presence, is said to have memorized all the teachings he heard and is celebrated for having recited all the Buddha’s teachings by memory at the first council of the Buddhist saṅgha, thus preserving the teachings after the Buddha’s parinirvāṇa. The phrase “Thus did I hear at one time,” found at the beginning of the sūtras, usually stands for his recitation of the teachings. He became a patriarch after the passing of Mahākāśyapa.

This was an important early site for the Buddha’s growing community. Anāthapiṇḍada, a wealthy patron of the Buddha, purchased the park, located outside Śrāvastī, at great cost, purportedly covering the ground with gold, and donated it to the saṅgha. It was there that the Buddha spent several rainy seasons and gave discourses that were later recorded as sūtras. It was also the site for one of the first Buddhist monasteries. (Provisional 84000 definition. New definition forthcoming.)

Yeshé Dé (late eighth to early ninth century) was the most prolific translator of sūtras into Tibetan. Altogether he is credited with the translation of more than one hundred sixty sūtra translations and more than one hundred additional translations, mostly on tantric topics. In spite of Yeshé Dé’s great importance for the propagation of Buddhism in Tibet during the imperial era, only a few biographical details about this figure are known. Later sources describe him as a student of the Indian teacher Padmasambhava, and he is also credited with teaching both sūtra and tantra widely to students of his own. He was also known as Nanam Yeshé Dé, from the Nanam (sna nam) clan.

In Buddhist literature, this is an epithet applied to buddhas, most often to Śākyamuni. The Sanskrit term generally means “possessing fortune,” but in specifically Buddhist contexts it implies that a buddha is in possession of six auspicious qualities (bhaga) associated with complete awakening. The Tibetan term‍—where bcom is said to refer to “subduing” the four māras, ldan to “possessing” the great qualities of buddhahood, and ’das to “going beyond” saṃsāra and nirvāṇa‍—possibly reflects the commentarial tradition where the Sanskrit bhagavat is interpreted, in addition, as “one who destroys the four māras.” This is achieved either by reading bhagavat as bhagnavat (“one who broke”), or by tracing the word bhaga to the root √bhañj (“to break”).

A high-ranking deity presiding over a divine world; he is also considered to be the lord of the Sahā world (our universe). Though not considered a creator god in Buddhism, Brahmā occupies an important place as one of two gods (the other being Indra/Śakra) said to have first exhorted the Buddha Śākyamuni to teach the Dharma. The particular heavens found in the form realm over which Brahmā rules are often some of the most sought-after realms of higher rebirth in Buddhist literature. Since there are many universes or world systems, there are also multiple Brahmās presiding over them. His most frequent epithets are “Lord of the Sahā World” (sahāṃpati) and Great Brahmā (mahābrahman).

Dhyāna is defined as one-pointed abiding in an undistracted state of mind, free from afflicted mental states. Four states of dhyāna are identified as being conducive to birth within the form realm. In the context of the Mahāyāna, it is the fifth of the six perfections. It is commonly translated as “concentration,” “meditative concentration,” and so on.

In the context of Buddhist philosophy, one way to describe experience in terms of eighteen elements (eye, form, and eye consciousness; ear, sound, and ear consciousness; nose, smell, and nose consciousness; tongue, taste, and tongue consciousness; body, touch, and body consciousness; and mind, mental phenomena, and mind consciousness).

This also refers to the elements of the world, which can be enumerated as four, five, or six. The four elements are earth, water, fire, and air. A fifth, space, is often added, and the sixth is consciousness.

Literally, “to flow” or “to ooze.” Mental defilements or contaminations that “flow out” toward the objects of cyclic existence, binding us to them. Vasubandhu offers two alternative explanations of this term: “They cause beings to remain (āsayanti) within saṃsāra” and “They flow from the Summit of Existence down to the Avīci hell, out of the six wounds that are the sense fields” (Abhidharma­kośa­bhāṣya 5.40; Pradhan 1967, p. 308). The Summit of Existence (bhavāgra, srid pa’i rtse mo) is the highest point within saṃsāra, while the hell called Avīci (mnar med) is the lowest; the six sense fields (āyatana, skye mched) here refer to the five sense faculties plus the mind, i.e., the six internal sense fields.

In Buddhist cosmology, this is our own realm, the lowest and most coarse of the three realms of saṃsāra. It is called this because beings here are characterized by their strong longing for and attachment to the pleasures of the senses. The desire realm includes hell beings, hungry ghosts, animals, humans, asuras, and the lowest six heavens of the gods‍—from the Heaven of the Four Great Kings (cāturmahā­rājika) up to the Heaven of Making Use of Others’ Emanations (para­nirmita­vaśa­vartin). Located above the desire realm is the form realm (rūpadhātu) and the formless realm (ārūpyadhātu).

A set of circumstances that do not provide the freedom to practice the Buddhist path: being born in the realms of (1) the hells, (2) hungry ghosts (pretas), (3) animals, or (4) long-lived gods, or in the human realm among (5) barbarians or (6) extremists, (7) in places where the Buddhist teachings do not exist, or (8) without adequate faculties to understand the teachings where they do exist.