| Noun | 1. | RAM disk - (computer science) a virtual drive that is created by setting aside part of the random-access memory to use as if it were a group of sectors; "access to a RAM disk is very fast but the data it contains is lost when the system is turned off" drive - (computer science) a device that writes data onto or reads data from a storage medium RAM, random access memory, random memory, random-access memory, read/write memory - the most common computer memory which can be used by programs to perform necessary tasks while the computer is on; an integrated circuit memory chip allows information to be stored or accessed in any order and all storage locations are equally accessible computer science, computing - the branch of engineering science that studies (with the aid of computers) computable processes and structures |