virtual memory
noun [ U ] uk/ˌvɜː.tju.əl ˈmem.ər.i/ us/ˌvɝː.tʃu.əl ˈmem.ɚ.i/
（电脑的）虚拟存储器，虚拟内存
space that can be used on the hard drive of a computer to store information temporarily so that there is more memory available when it is needed by software such as a computer game
Compare: RAMROM