Mauritius môrĭsh´ēəs, –əs [key], officially Republic of Mauritius, republic (2005 est. pop. 1,231,000), 790 sq mi (2,046 sq km), in the SW Indian Ocean. It is part of the Mascarene Islands , c.500 mi (800 km) E of Madagascar. The island of Rodriguez and two groups of small islands, Agalega and