Search Result for "kaiser": 
Wordnet 3.0

NOUN (1)

1. the title of the Holy Roman Emperors or the emperors of Austria or of Germany until 1918; 



The Collaborative International Dictionary of English v.0.48:

Kaiser \Kai"ser\, n. [Gr., fr. L. Caesar. Cf. Kesar, and
   Czar.]
   The ancient title of emperors of Germany assumed by King
   William of Prussia when crowned sovereign of the new German
   empire in 1871.
   [1913 Webster]


WordNet (r) 3.0 (2006):

Kaiser
    n 1: the title of the Holy Roman Emperors or the emperors of
         Austria or of Germany until 1918