| NAT | an honorary American society of scientists created by President Lincoln during the American Civil War |
|---|---|
| NAT | an independent agency of the United States government responsible for aviation and spaceflight |
| NAT | a song formally adopted as the anthem for a nation |
| NAT | (Great Britain) benefits paid to bring incomes up to minimum levels established by law |
| NAT | a commercial bank chartered by the federal government |
| NAT | a Hall of Fame and museum in Cooperstown, New York, honoring great baseball players |
| NAT | the capital city of a nation |
| NAT | censorship under civil authority of communications entering or leaving of crossing the borders of the United States or its territories or possessions |
| NAT | the debt of the national government (as distinguished from the debts of individuals and businesses and political subdivisions) |
| NAT | a limit set by Congress beyond which the national debt cannot rise |
| NAT | an emblem flown as a symbol of nationality |
| NAT | United States military reserves recruited by the states and equipped by the federal government |