The three highest-ranking officials in the imperial court; specifically refers to the Grand Preceptor 太师tàishī, Grand Tutor 太傅tàifù, and Grand Guardian 太保tàibǎo in the Zhou dynasty, or the Grand Marshal 大司马dàsīmǎ, Grand Minister of Education 大司徒dàsītú, and Grand Minister of Works 大司空dàsīkōng in the Han dynasty
astronomy
Three stars in the handle of the Big Dipper or near Ursa Major, historically associated with the high officials of the court