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Definition of Andrew Mellon from the Oxford Advanced Learner's Dictionary

 

Andrew Mellon

 
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(1855-1937) a rich US businessman who also served in the US government. He gave large amounts of money to help charities, museums, etc. He was Secretary of the Treasury (1921-31) and then US Ambassador to Britain (1932-3). In 1937 he gave his large art collection to establish the National Gallery of Art in Washington, DC.