Ky·o·ga or Ki·o·ga (k?-??g?), Lake A shallow lake of central Uganda. It is noted for its papyrus swamps.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.Kyo?ga or Kio?ga (?kyo? g?) n. Lake, a lake in central Uganda. ab. 1000 sq. mi. (2600 sq. km). Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.