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Longman Dictionary of Contemporary English
hard disk
noun
EXAMPLES FROM CORPUS
▪ A Yes a hard disk does make a great deal of difference to how easy a machine is to use.
▪ Before next month's Starting Block, try roaming around your hard disk, looking at the different files it contains.
▪ Desktop really can get the most out of your hard disk.
▪ For example, some viruses display a text string or delete all files on the hard disk on a particular date.
▪ Grimmer agents were saying it was a case of an entirely lost hard disk.
▪ My hard disk has blown up and I've lost that 5,000 word report.
▪ When I first turned it on, it reported a hard disk failure.
The Collaborative International Dictionary
hard disk

magnetic disc \magnetic disc\, magnetic disk \magnetic disk\n. A ditical memory device consisting of a flat disk covered with a magnetic coating on which information is stored; a hard disk, floppy disk, and diskette are typically magnetic disks.

Syn: disk, disc.

Wiktionary
hard disk

n. 1 (context computing English) One of a series of parallel magnetic recording disks in a drive unit, used for the recording and retrieval of digital information; used especially in personal computers. 2 (context computing English) The unit itself, and all the disks within it.

WordNet
hard disk

n. a rigid magnetic disk mounted permanently in a drive unit [syn: hard disc, fixed disk]

Usage examples of "hard disk".

There are people out there who can extract everything that has been on a hard disk for the last several months -- or years.

They haven't invented a unit of time short enough to measure how long it will take me to crack the Phonetix hard disk.

I've deleted all my notes from the hard disk, but my journal is still on there.

Pretend that her beloved Tony had never tried to steal the hard disk?

Similarly, you'll need Professional if you have a multiprocessor PC, if you want Windows to encrypt the files on your hard disk, or if you want to use the OS's new Remote Desktop feature.

With the Laplink, I could dump the contents of one computer's hard disk to the hard disk in the portable.

We went through that hard disk block by block and found disjointed fragments of countless old, discarded, forgotten files, but none of what I wanted.

They havent invented a unit of time short enough to measure how long it will take me to crack the Phonetix hard disk.

Or the other way around, making mem -- ory out of extra storage on your hard disk.

Or the other way around, making memory out of extra storage on your hard disk.

The rest is probably on the hard disk of the computer that was stolen from your grandmother's or on one of Casen's back-up disks.