Word: 天子 (tiānzǐ) 天子 dictionary entry tiānzǐ the (rightful) emperor; "Son of Heaven" (traditional English translation) Full dictionary entry for 天子 Example sentences using 天子 2 sentences, showing page 1 of 1. 在古书里，皇帝常被称为天子。 Zài gǔshū lǐ, huángdì cháng bèi chēngwéi tiānzǐ. In ancient books, the emperor is often called the Son of Heaven. 天子一声令下，大军马上出发了。 Tiānzǐ yìshēng lìng xià, dàjūn mǎshàng chūfāle. At the emperor's command, the great army set off at once.