DEFRAGMENT is validvalid

to reorganize data on computer media to make related data contiguous [v DEFRAGMENTED, DEFRAGMENTING, DEFRAGMENTS] : DEFRAGMENTATION [n], DEFRAGMENTER [n]

125,591 of 196,601 in NWL2023·also valid in CSW24

to run a program which reduces or eliminates the fragmentation of (a file or disk) by bringing together parts of files stored in separate locations to a single location on the disk [v -ED, -ING, -S]