Real Dictionary

treasury
In Britain, the United States, and some other countries, the Treasury is the government department that deals with the country's finances.

treasury in American English
a place where treasure is kept; room or building where valuable objects are preserved
noun: a place where the funds of the government, of a corporation, or the like are deposited, kept, and disbursed

treasury in British English
noun: (in various countries) the government department in charge of finance. In Britain the Treasury is also responsible for economic strategy
noun: a storage place for treasure

Treasury in Finance
noun: The Treasury is the US government department responsible for money, taxes, and revenue.