0 an informal name for the Federal National Mortgage Association: a US government organization that buys and sells loans (= money that has been borrowed) on the financial markets in order to raise more money to lend to home buyers
1 an informal name for the Federal National Mortgage Association: an official organization in the US that buys and sells loans in order to raise money to lend to house buyers. Fannie Mae was taken under Federal government control in 2008:
2 a bond that is issued by Fannie Mae