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.
The floppy disk (or a 3Â½ floppy for today's standard) is a removable magnetic storage medium. Floppy disks are used for moving information between computers, laptops or other devices. Some early digital cameras, electronic music instruments and older computer game consoles use floppy disks.