MINISTRY

Government department, at the administrative level normally headed by a minister (or equivalent rank, e.g. secretary of state), who holds it as portfolio, especially in a constitutional monarchy, but also as a polity

"She works for the ministry of finance."

The complete body of government ministers (whether or not they are in cabinet) under the leadership of a head of government (such as a prime minister)

"The premier offered his last ministry's resignation to the monarch, and is asked to form a new one in accordance with the election results."

A ministration