Abhidhamma: In the discourses of the Pali Canon, this term simply means “higher Dhamma,” and a systematic attempt to define the Buddha’s teachings and understand their interrelationships. (2) A later collection of analytical treatises based on lists of categories drawn from the teachings in the discourses, added to the Canon several centuries after the Buddha’s life.
Acariya: Teacher; mentor. See kalyanamitta.
Adhitthana: Determination; resolution. One of the ten perfections (paramis).
Ajaan: (Thai; also “Ajarn”, “Ajahn”, etc.). Teacher; mentor. Equivalent to the Pali acariya.
Anagami: Non-returner. A person who has abandoned the five lower fetters that bind the mind to the cycle of rebirth (see samyojana), and who after death will appear in one of the Brahma worlds called the Pure Abodes, there to attain nibbana, never again to return to this world.
Anapanasati: Mindfulness of breathing. A meditation practice in which one maintains one’s attention and mindfulness on the sensations of breathing.
Anatta: Not-self; ownerless.