ˈkīzə(r) noun
( -s )
Etymology: Middle English keiser, from Old Norse keisari; akin to Old English cāsere emperor, Old High German keisur, Gothic kaisar; all from a prehistoric Germanic word borrowed from Latin Caesar, cognomen of Gaius Julius Caesar died 44 B.C. Roman general and statesman
: emperor: as
a. : the head of an ancient or medieval empire (as the Roman Empire or the Holy Roman Empire)
b.
[German, from Old High German keisur ]
: the sovereign of Austria from 1804 to 1918
all the countries over which the Hapsburg kaisers claimed personal lordship — Century Magazine
c.
[German, from Old High German keisur ]
: the ruler of Germany from 1871 to 1918
the appointment of the chancellor of the German Empire by the kaiser