Meaning: Able to withstand attack. Synonyms: unassailable; unattackable; impregnable; inviolable; secure; strong. Context examples: an impregnable fortress / fortifications that made the frontier inviolable. Similar: invulnerable (immune to attack; impregnable)
Definition - What does Magnetic Disk mean? A magnetic disk is a storage device that uses a magnetization process to write, rewrite and access data. It is covered with a magnetic coating and stores data in the form of tracks, spots and sectors. Hard disks, zip disks and floppy disks are common examples of magnetic disks.
countable noun. 1  A floppy disk is a small magnetic disk that is used for storing computer data and programs. 2  a flexible removable magnetic disk that stores information and can be used to store data for use in a microprocessor. 3  a small, flexible, relatively inexpensive computer disk for storing data, esp. in smaller computers.