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English definition of “hard disk”

hard disk

noun [C]  /ˈhɑrd ˈdɪsk/ (also hard drive,    /ˈhɑrd ˈdrɑɪv/) us  
a disk with a magnetic covering on which a large amount of information can be stored and used by a computer
(Definition of hard disk from the Cambridge Academic Content Dictionary © Cambridge University Press)
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