- (computer hardware) Computer memory (such as RAM) that requires a constant electrical charge to maintain its contents.
A type of memory that loses its content when the power is turned off. The primary example is the computer's main memory, which is made up of dynamic RAM (DRAM) and static RAM (SRAM) chips. Newer types of memory are expected to obsolete volatile DRAM and SRAM memory in the future (see future memory chips). Contrast with non-volatile memory. See dynamic RAM and static RAM.