A kaiser was the emperor of Germany or Austria. The last kaiser.
The title ended in 1918 with the collapse of both empires. Kaiser and tsar are both forms of the name Caesar, which became the word for an emperor across Europe.
1nounkaiserThe former emperor of Germany or Austria.
“The kaiser abdicated and lived another twenty-three years in Holland.”
kaiser is a ruler.
Latin
Caesar
Proto-Germanic
*kaisaraz
Proto-West Germanic
*kaisar
Old High German
keisar — emperor
Middle English
kayser
English
Kaiser
English, today
kaiser
Built from
Kaiser Middle English kayser, from Old High German keisar (“emperor”), from Proto-West Germanic kaisar, from Proto-Germanic kaisaraz, from Latin Caesar. The native Old English descendant of that Proto-Germanic word was cāser (“emperor”), but the shape of Middle English kayser (“emperor”) (versus the expected caser, coser) suggests it was borrowed from another Germanic language rather than inherited, and the modern English spelling and sense seem to be modified after modern German rather than a direct continuation of Middle English. Compare a doublet of tsar, which was borrowed from Slavic. a doublet of Caesar and tsar.
Etymology from Wiktionary, CC BY-SA