1. to reorganize the data on a computer disk so that files are stored in contiguous blocks, improving access speed
Usage: computing; third person singular present tense of 'defrag'

Examples

• The system defrags the hard drive automatically every week.
• She defrags her computer to keep it running smoothly.
• Modern SSDs don't need to be defragged like older mechanical drives do.
• The software defrags fragmented files in the background.
• He defrags his disk whenever performance starts to slow down.