bit·map or bit map (b?t?m?p?)n. Computers A set of bits that represents a graphic image, with each bit or group of bits corresponding to a pixel in the image.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.bitmap (?b?t?mæp) n (Computer Science) a picture created on a visual display unit where each pixel corresponds to one or more bits in memory, the number of bits per pixel determining the number of available coloursvb, -maps, -mapping or -mapped (Computer Science) (tr) to create a bitmap ofCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014bit·map (b?t?m?p?) Computer Science A set of bits that represents a graphic image, with each bit or group of bits corresponding to a pixel in the image.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.