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- a city in and the capital of Iran, in the N part: wartime conference of Roosevelt, Churchill, and Stalin 1943.
- the capital of Iran, at the foot of the Elburz Mountains: built on the site of the ancient capital Ray, destroyed by Mongols in 1220; became capital in the 1790s; three universities. Pop: 7 352 000 (2005 est)
Capital of Iran and the largest city in the country; located in northern Iran.