- the rulers of the Holy Roman Empire, 962-1806
- the rulers of Austria, 1804-1918
- the rulers of Germany, 1871-1918
Origin of kaiserMiddle English caiser, probably via Old Norse keisari, akin to Old Frisian keisar, Old High German keisar ; from Gothic kaisar, ultimately ; from Classical Latin Caesar, family name of first Roman emperors; reinforced, especially in senses kaiser and amp; , by German kaiser
- Any of the emperors of the Holy Roman Empire (962–1806), of Austria (1804–1918), or of Germany (1871–1918).
- Used as the title for such a man.
Origin of KaiserGerman, from Middle High German keiser, from Old High German keisar, from Latin Caesar; see caesar.
- the German Emperor, often specifically Wilhelm II
From German Kaiser (“emperor”).