Someone's mother country is the country in which they or their ancestors were born and to which they still feel emotionally linked, even if they live somewhere else.
Dr Kengerli looks to Turkey as his mother country.
2. singular noun
If you refer to the mother country of a particular state or country, you are referring to the very powerful country that used to control its affairs.
Australia, New Zealand, and Canada, had no colonial conflict with the mother country.
mother country in British English
noun
1.
the original country of colonists or settlers
2. another term for fatherland
mother country in American English
motherland
Examples of 'mother country' in a sentence
mother country
Various governments attempted to exclude such rival foreign merchants by establishing colonial empires that could be controlled by the mother country to ensure a monopoly of trade.
Hunt, E. K. Property and Prophets: The Evolution of Economic Institutions and Ideologies (1995)