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.
n (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored. a small plastic magnetic disk enclosed in a stiff envelope with a radial slit; used to store data or programs for a microcomputer. a rigid magnetic disk mounted permanently in a drive unit.