Definition from Nolo’s Plain-English Law Dictionary
U.S. embassies represent the U.S. government in other countries, and are where the U.S. ambassador works. The United States has embassies located in many countries around the world, usually in their capital city. The U.S. may also operate smaller versions of the embassy called "consulates" in other cities within the same country, presided over by a U.S. consul. Most U.S. embassies and consulates accept and process applications for both nonimmigrant and immigrant visas.