Try Our Apps


Avoid these words. Seriously.


[dee-frag-muh nt, -ment] /diˈfræg mənt, -mɛnt/ Computers.
verb (used with object)
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 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Contemporary definitions for defragment
intransitive verb

to carry out or undergo defragmentation; also called defrag

Word Origin


Usage Note

defragmenting, n; defragmentation, n; defragmenter, n's 21st Century Lexicon
Copyright © 2003-2014, LLC
Cite This Source
Word Origin and History for defragment

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

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
defragment in Science
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.
Cite This Source

Word of the Day

Nearby words for defragment

Word Value for defragment

Scrabble Words With Friends