Main Entry: kai·ser

Pronunciation: \ˈkī-zər\

Function: noun

Etymology: Middle English, from Old Norse keisari; akin to Old High German keisur emperor; both from a prehistoric Germanic word borrowed from Latin Caesar, cognomen of the Emperor Augustus

Date: 13th century

: emperor; especially : the ruler of Germany from 1871 to 1918

— kai·ser·dom \-zər-dəm\ noun

— kai·ser·ism \-zə-ˌri-zəm\ noun