side·board (s?d?bôrd?)n.1. A long, low piece of dining room furniture having drawers and shelves for storing linens and tableware and a flat surface for serving food or displaying items.2. A board that forms a side or part of a side: the sideboards of a skating rink.3. sideboards Chiefly British Sideburns.[Sense 3, probably alteration of sideburns.]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.sideboard (?sa?d?b??d) n (Furniture) a piece of furniture intended to stand at the side of a dining room, with drawers, cupboards, and shelves to hold silver, china, linen, etcCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014side?board (?sa?d?b?rd, -?bo?rd) n. a piece of furniture, often with shelves and drawers, for holding articles of table service. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.SideboardA piece of dining room furniture used for storing things such as plates and silverware.1001 Words and Phrases You Never Knew You Didn?t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan