Qing·hai (ch?ng?h??) also Tsing·hai (ts?ng?-) A province of west-central China. The Mekong, Yangtze, and Yellow Rivers originate within its borders. Xining is the capital.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.Qinghai (?t????ha?) , Tsinghai or Chinghain1. (Placename) a province of NW China: consists largely of mountains and high plateaus. Capital: Xining. Pop: 5 340 000 (2003 est). Area: 721 000 sq km (278 400 sq miles)2. (Placename) the Pinyin transliteration of the Chinese name for Koko NorCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Qing?hai or Ch’ing?hai (?t????ha?) n. 1. a province in NW China. 4,740,000; 278,400 sq. mi. (721,000 sq. km). Cap.: Xining. 2. Also called Koko Nor. a salt lake in NE Qinghai province. 2300 sq. mi. (5950 sq. km). Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.