Solid State Drive (SSD) Definition

SSD Definition from Wikipedia:

A solid-state drive (SSD) is a data storage device that uses solid-state memory to store persistent data. A SSD emulates a hard disk drive interface, thus easily replacing it in most applications. A SSD using SRAM or DRAM (instead of flash memory) is often called a RAM-drive.

The original usage of the term solid-state (from solid-state physics) refers to the use of semiconductor devices rather than electron tubes, but in this context, has been adopted to distinguish solid-state electronics from electromechanical devices as well. With no moving parts, solid-state drives are less fragile than hard disks and are also silent (unless a cooling fan is used); as there are no mechanical delays, they usually employ low access time and latency.

SSD Definition from About.com

Solid state is an electrical term that refers to electronic circuitry that is built entirely out of semiconductors. The term was originally used to define those electronics such as a transistor radio that used semiconductors rather than vacuum tubes in its construction. Most all electronics that we have today are built around semiconductors and chips. In terms of a SSD, it refers to the fact that the primary storage medium is through semiconductors rather than a magnetic media such as a hard drive.

SSD Definition from Crucial.com

SSD (Solid State Drive) technology delivering the benefits of flash technology in a completely different way. More reliable, faster, and more durable than traditional magnetic hard drives, our SSDs are a forward-thinking solution for mobile users. Users who want longer battery life, and can't afford to lose or corrupt the data stored on their notebooks. Likewise, SSDs are a great alternative for the PC enthusiast who is always looking for the very best in system performance.