IPA: /ˈzɑːrdəm/
KK: /tsɑrdəm/
The area or domain that is governed by a tsar, a title for a monarch in Russia.
The vast tsardom included many different cultures and regions.
Tsardom is formed from "tsar" (from Russian "царь", meaning emperor or king) and "-dom" (meaning state or condition of). The word refers to the state or condition of being a tsar or the reign of a tsar.
Think of a 'tsar' as a king and '-dom' as the state of being. So, tsardom means the state of being a king.