What is "tianzun"

Tianzun , literally the Lord of Heaven, the Universal Lord, is a title for certain Taoist deities of the highest order, akin to the " Buddha" in Buddhism, and may refer to any of a number of different deities:

• The Three Pure Ones (Taoist holy trinity) i.e. 玉清元始天尊、上清灵宝天尊、太清道德天尊
• The Nine Great Tianzun i.e. 太乙救苦天尊、十方救苦天尊、九幽拔罪天尊、朱陵度命天尊、火炼丹界天尊、法桥大度天尊、金阙化身天尊、逍遥快乐天尊、宝华圆满天尊
• 文殊广法天尊 and 道行天尊, Taoist deities referred to in the novel Investiture of the Gods (more commonly known as Fengshen Yanyi).