/ ˈkaɪzə(r); NAmE / noun (from German )
1.
Kaiser (in the past) a ruler of Germany, of Austria, or of the Holy Roman Empire :
Kaiser Wilhelm
2.
(also ˈkaiser roll ) ( NAmE ) a crisp bread roll
••
WORD ORIGIN
Middle English cayser , from Old Norse keisari , based on Latin Caesar , family name of the Roman statesman, Julius Caesar, and later reinforced by Middle Dutch keiser . The modern English form (early 19th cent.) derives from German Kaiser .