1. a Russian emperor before 1917
Usage: historical
2. a person appointed by a government to lead efforts in a particular area
Usage: informal
3. a person with great power in a particular area
Usage: informal

Examples

• Nicholas II was the last czar of Russia.
• The czar ruled the Russian Empire with absolute power.
• The president appointed a drug czar to combat the crisis.
• She was known as the fashion czar of the company.
• The energy czar announced new policies yesterday.
• He became the czar of the entertainment industry.
• The technology czar oversees all digital initiatives.