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.
Disk storage, a general category of data storage mechanisms Magnetic disk Floppy disk, a magnetic data storage device using a flexible disc. Hard disk drive, a non-volatile magnetic data storage device. Optical disc, commonly a polycarbonate disc Blu-ray Disc (BD), a high-density optical disc intended mainly for video storage. Compact Disc (CD), a form of optical disc used mainly for audio data.