From Longman Dictionary of Contemporary EnglishRelated topics: Computersvirtual memoryˌvirtual ˈmemory noun [singular, uncountable] technicalspace on a computer for storinginstructions and programs until they are needed or being used → RAM, ROMFrom Longman Business Dictionaryvirtual memoryˌvirtual ˈmemoryCOMPUTINGthe memory in a computer system that is stored and moved automatically as it is needed so that it appears to be in the main memory →memory