floppy diskn. A flexible plastic disk coated with magnetic material and covered by a protective jacket, used for storing data magnetically. Also called diskette.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.floppy disk n (Computer Science) a flexible removable magnetic disk that stores information and can be used to store data for use in a microprocessor. Also called: diskette or flexible disk Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014flop?py disk? n. a thin plastic disk coated with magnetic material, for storing computer data and programs; diskette. [1970?75] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.flop·py disk (fl?p?p?) Computer Science A flexible plastic disk coated with magnetic material and covered by a protective jacket, used for storing data.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.