warm·ing pan (wôr?m?ng)n. A metal pan with a cover and a long handle, designed to hold hot liquids or coals and used to warm a bed. Also called bedwarmer.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.warming pan n a pan, often of copper and having a long handle, filled with hot coals or hot water and formerly drawn over the sheets to warm a bed Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014warm?ing pan` n. a long-handled, covered pan filled with live coals or hot water, formerly used for warming a bed. [1565?75] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.