Guyana (gīăn'u, –än'–) [key], officially Co-operative Republic of Guyana, republic (2005 est. pop. 765,000), 83,000 sq mi (214,969 sq km), NE South America. It is bordered on the N by the Atlantic Ocean, on the E by Suriname, on the S and W by Brazil, and on the W by Venezuela. The capital and largest city is Georgetown.
