tsar
tsar /z'ɑːr/ (tsars)
also czar
1 [N-COUNT; N-TITLE]
In former times, the tsar was the king of Russia.
2 [N-COUNT] supp N
A particular kind of tsar is a person who has been appointed by the government to deal with a particular problem that is affecting the country.
...the former New York police chief who was appointed as `drug tsar' by Bill Clinton...
also czar
1 [N-COUNT; N-TITLE]
In former times, the tsar was the king of Russia.
2 [N-COUNT] supp N
A particular kind of tsar is a person who has been appointed by the government to deal with a particular problem that is affecting the country.
...the former New York police chief who was appointed as `drug tsar' by Bill Clinton...