noun
political upheaval; coup d'état; change of government
Refers to a sudden, often disruptive change in political leadership or system, ranging from a coup to a major government reshuffle. Commonly used in news reports.
その国では軍事政変が起きた。
A military coup took place in that country.
政変の後、新政権が発足
After the political upheaval, a new administration was launched.