WordReference Random House Unabridged Dictionary of American English © 2026
virtual storage, [Computers.]
  1. Computinga system whereby addressable memory is extended beyond main storage through the use of secondary storage managed by system software in such a way that programs can treat all of the designated storage as addressable main storage. Also called virtual memory. Cf. real storage. 
  • 1970–75

Collins Concise English Dictionary © HarperCollins Publishers::
virtual storage, virtual memory n
  1. a computer system in which the size of the memory is effectively increased by automatically transferring sections of a program from a large capacity backing store into the smaller core memory as they are required
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