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defragment

[dee-frag-muh nt, -ment] /diˈfræg mənt, -mɛnt/
verb (used with object)
1.
to reorganize files on (a disk) so that the parts of each file are stored in contiguous sectors on the disk, thereby improving computer performance and maximizing disk space.
Also, Informal, defrag.
Related forms
defragmentation, noun
defragmenter, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Word Origin and History for de fragmentation

defragment

v.

1992, in computer sense, from de- + fragment. Related: Defragmented; defragmenting.

Online Etymology Dictionary, © 2010 Douglas Harper
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de fragmentation in Science
defragment
  (dĭ-frāg'mənt)   
To reorganize the way information is stored on a computer disk so that all of the information belonging to a file is stored in a single, contiguous area the disk.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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