also: らまきょう
noun
Lamaism
Refers to Tibetan Buddhism, especially the form practiced in Mongolia and Tibet. The term is sometimes considered outdated or imprecise by scholars, but remains in common use in Japanese.
ラマ教はチベット仏教の一派です。
Lamaism is a school of Tibetan Buddhism.
モンゴルではラマ教が広く信仰されている。
Lamaism is widely practiced in Mongolia.
チベット仏教 is the more precise and modern term for Tibetan Buddhism, while ラマ教 is an older, more colloquial label often used in historical or cultural contexts.
From ラマ (lama, from Tibetan བླ་མ) + 教 (religion, teaching). The kanji spelling 喇嘛 is ateji.