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.

A general term applied to spiritual practitioners who live as ascetic mendicants. In Buddhist texts, the term usually refers to Buddhist monastics, but it can also designate a practitioner from other ascetic/monastic spiritual traditions. In this context śramaṇa is often contrasted with the term brāhmaṇa (bram ze), which refers broadly to followers of the Vedic tradition. Any renunciate, not just a Buddhist, could be referred to as a śramaṇa if they were not within the Vedic fold. The epithet Great Śramaṇa is often applied to the Buddha.

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 being who is dedicated to the cultivation and fulfilment of the altruistic intention to attain perfect buddhahood, traversing the ten bodhisattva levels (daśabhūmi, sa bcu). Bodhisattvas purposely opt to remain within cyclic existence in order to liberate all sentient beings, instead of simply seeking personal freedom from suffering. In terms of the view, they realize both the selflessness of persons and the selflessness of phenomena.

The term can be understood to mean “great courageous one” or "great hero,” or (from the Sanskrit) simply “great being,” and is almost always found as an epithet of “bodhisattva.” The qualification “great” in this term, according to the majority of canonical definitions, focuses on the generic greatness common to all bodhisattvas, i.e., the greatness implicit in the bodhisattva vow itself in terms of outlook, aspiration, number of beings to be benefited, potential or eventual accomplishments, and so forth. In this sense the mahā- is closer in its connotations to the mahā- in “Mahāyāna” than to the mahā- in “mahāsiddha.” While individual bodhisattvas described as mahāsattva may in many cases also be “great” in terms of their level of realization, this is largely coincidental, and in the canonical texts the epithet is not restricted to bodhisattvas at any particular point in their career. Indeed, in a few cases even bodhisattvas whose path has taken a wrong direction are still described as bodhisattva mahāsattva.

Later commentarial writings do nevertheless define the term‍—variably‍—in terms of bodhisattvas having attained a particular level (bhūmi) or realization. The most common qualifying criteria mentioned are attaining the path of seeing, attaining irreversibility (according to its various definitions), or attaining the seventh bhūmi.

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).

A member of the highest of the four castes in Indian society, which is closely associated with religious vocations.

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.

The term dharma conveys ten different meanings, according to Vasubandhu’s Vyākhyā­yukti. The primary meanings are as follows: the doctrine taught by the Buddha (Dharma); the ultimate reality underlying and expressed through the Buddha’s teaching (Dharma); the trainings that the Buddha’s teaching stipulates (dharmas); the various awakened qualities or attainments acquired through practicing and realizing the Buddha’s teaching (dharmas); qualities or aspects more generally, i.e., phenomena or phenomenal attributes (dharmas); and mental objects (dharmas).

A series of progressively more subtle states of meditative realization or attainment. There are several presentations of these found in the canonical literature. One of the most common is as follows: (1) One observes form while the mind dwells at the level of the form realm. (2) One observes forms externally while discerning formlessness internally. (3) One dwells in the direct experience of the body’s pleasant aspect. (4) One dwells in the realization of the sphere of infinite space by transcending all conceptions of matter, resistance, and diversity. (5) Transcending the sphere of infinite space, one dwells in the realization of the sphere of infinite consciousness. (6) Transcending the sphere of infinite consciousness, one dwells in the realization of the sphere of nothingness. (7) Transcending the sphere of nothingness, one dwells in the realization of the sphere of neither perception nor nonperception. (8) Transcending the sphere of neither perception nor nonperception, one dwells in the realization of the cessation of conception and feeling.

Emptiness denotes the ultimate nature of reality, the total absence of inherent existence and self-identity with respect to all phenomena. According to this view, all things and events are devoid of any independent, intrinsic reality that constitutes their essence. Nothing can be said to exist independent of the complex network of factors that gives rise to its origination, nor are phenomena independent of the cognitive processes and mental constructs that make up the conventional framework within which their identity and existence are posited. When all levels of conceptualization dissolve and when all forms of dichotomizing tendencies are quelled through deliberate meditative deconstruction of conceptual elaborations, the ultimate nature of reality will finally become manifest. It is the first of the three gateways to liberation.

A cosmic period of time, sometimes equivalent to the time when a world system appears, exists, and disappears. According to the traditional Abhidharma understanding of cyclical time, a great eon (mahākalpa) is divided into eighty lesser eons. In the course of one great eon, the universe takes form and later disappears. During the first twenty of the lesser eons, the universe is in the process of creation and expansion; during the next twenty it remains; during the third twenty, it is in the process of destruction; and during the last quarter of the cycle, it remains in a state of empty stasis. A fortunate, or good, eon (bhadrakalpa) refers to any eon in which more than one buddha appears.

According to traditional Buddhist cosmology, our universe consists of a central mountain, known as Mount Meru or Sumeru, surrounded by four island continents (dvīpa), one in each of the four cardinal directions. The Abhidharmakośa explains that each of these island continents has a specific shape and is flanked by two smaller subcontinents of similar shape. To the south of Mount Meru is Jambudvīpa, corresponding either to the Indian subcontinent itself or to the known world. It is triangular in shape, and at its center is the place where the buddhas attain awakening. The humans who inhabit Jambudvīpa have a lifespan of one hundred years. To the east is Videha, a semicircular continent inhabited by humans who have a lifespan of two hundred fifty years and are twice as tall as the humans who inhabit Jambudvīpa. To the north is Uttarakuru, a square continent whose inhabitants have a lifespan of a thousand years. To the west is Godānīya, circular in shape, where the lifespan is five hundred years.

Four gods who live on the lower slopes (fourth level) of Mount Meru in the eponymous Heaven of the Four Great Kings (Cāturmahā­rājika, rgyal chen bzhi’i ris) and guard the four cardinal directions. Each is the leader of a nonhuman class of beings living in his realm. They are Dhṛtarāṣṭra, ruling the gandharvas in the east; Virūḍhaka, ruling over the kumbhāṇḍas in the south; Virūpākṣa, ruling the nāgas in the west; and Vaiśravaṇa (also known as Kubera) ruling the yakṣas in the north. Also referred to as Guardians of the World or World Protectors (lokapāla, ’jig rten skyong ba).