Tzu Hsi (tso?o? sh??) See Cixi.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.Tz’u Hsi or Tzu Hsi (?tsu ??i) n. 1835?1908, empress dowager of China: regent 1862?73, 1875?89, 1898?1908. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.