magnetic tapen. A plastic tape coated with iron oxide or another metallic particle for use in magnetic recording.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.magnetic tape n (Electronics) a long narrow plastic or metal strip coated or impregnated with a ferromagnetic material such as iron oxide, used to record sound or video signals or to store information in computers. Sometimes (informal) shortened to: mag tape Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014magnet?ic tape? n. a ribbon of material coated with a substance sensitive to electromagnetic impulses and used to record sound, images, or data. Compare audiotape, videotape. [1935?40] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.magnetic tapeA tape or ribbon of any material impregnated or coated with magnetic or other material on which information may be placed in the form of magnetically polarized spots.Dictionary of Military and Associated Terms. US Department of Defense 2005.