Ocean-Wide Lotus Assembly: The gathering of Amitabha Buddha, the Bodhisattvas, the sages and the saints, and all other superior beings in the Land of Ultimate Bliss. The term is generally associated with the Avatamsaka Sutra.
Once Returner: A sage who has but one rebirth left before reaching Arhatship, and escaping birth and death.
One-life Bodhistava: A Bodhisattva who is one lifetime away from Buddahood. Maitreya is a One-life Bodhisattva.