Kaiser (noun)

1. Emperor of Germany.
2. Emperor of Austria.

Origin:

Mid 19th century: from german kaiser, from latin caesar (see caesar).

Examples:

1. The kaiser was the emperor of Germany during World War I.
2. The last kaiser of Austria was Charles I.
3. The kaiser had a powerful army at his disposal.
4. The kaiser was deposed after the end of World War I.
5. The kaiser's rule came to an end with the defeat of Germany in World War I.