White Housen.1. The executive branch of the US government.2. The executive mansion of the President of the United States.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.White House n 1. (Government, Politics & Diplomacy) the official Washington residence of the president of the US 2. (Government, Politics & Diplomacy) the US presidency Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014White? House` n. the, 1. the official residence of the president of the U.S.: a white mansion in Washington, D.C. 2. the executive branch of the U.S. government. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.