Ny·as·a (n?-?s??, nyä?sä), Lake also Lake Malawi A lake of southeast-central Africa between Tanzania, Mozambique, and Malawi.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Nyasa (n??æs?; na??æs?) or Nyassan (Placename) Lake Nyasa a lake in central Africa at the S end of the Great Rift Valley: the third largest lake in Africa, drained by the Shire River into the Zambezi. Area: about 28 500 sq km (11 000 sq miles). Malawi name: (Lake) Malawi Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Ma?la?wi (m??l? wi) n., pl. -wis, (esp. collectively) -wi. 1. Formerly, Nyasaland. a republic in SE Africa, on Lake Malawi: formerly a British protectorate; became an independent member of the Commonwealth of Nations in 1964; a republic since 1966. 10,000,416; 45,747 sq. mi. (118,484 sq. km).Cap.: Lilongwe. 2. Lake. Formerly, Nyasa. a lake in SE Africa, between Malawi, Tanzania, and Mozambique. 11,000 sq. mi. (28,500 sq. km). 3. Maravi. Ma?la?wi?an, adj., n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.