天てん業ぎょうてんぎょうMeanings1nounemperor's work; imperial undertakingArchaic or literary term referring to the work or mission of an emperor. Not used in modern everyday language.「天てん業ぎょう」は、古ふるい文ぶん献けんで天皇てんのうの事じ業ぎょうを指さす言こと葉ばとして見みられる。The word 天業 is seen in old texts as a term for the emperor's work.