Si·chuan also Sze·chuan or Sze·chwan (s?ch?wän?) A province of southwest China crossed by the Yangtze River. Chengdu 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.Sichuan (?s?t?w??n) , Szechuan or Szechwann (Placename) a province of SW China: the most populous administrative division in the country, esp in the central Red Basin, where it is crossed by three main tributaries of the Yangtze. Capital: Chengdu. Pop: 81 000 000 (2003 est). Area: about 569 800 sq km (220 000 sq miles)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Si?chuan (?s?t??w?n, ?s?t? u??n) also Szechwan n. a province in S central China. 112,140,000; 219,691 sq. mi. (569,000 sq. km). Cap.: Chengdu. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.