Czar (noun)

1. An emperor or king of Russia until the Russian Revolution of 1917.
2. A person with extensive power and authority over a particular area or domain, often used in a humorous or ironic sense.

Origin:

Derived from the russian word 'tsar' meaning 'emperor'.

Examples:

1. The last czar of Russia, Nicholas II, was overthrown and executed in 1917.
2. The new manager is being referred to as the 'marketing czar' due to his extensive control over the department.
3. The city council appointed a 'traffic czar' to find solutions to the congested roadways.
4. The czar had a vast empire stretching from Europe to Asia.
5. The CEO was jokingly referred to as the 'email czar' due to his strict policy on office communication.