The third ruler in a dynasty or lineage sharing the same name; for example, King Henry III.

(literary) Three generations of a family, typically referring to grandfather, father, and son.

In Buddhism, refers to the past, present, and future.

The three stages of historical development in the Gongyang school of 春秋 chūn​qiū scholarship, later adapted by Kang Youwei to describe different levels of societal peace and chaos.

(archaic) A period of three years.