Wiktionary
demagnetise
alt. 1 (label en British spelling) To make something non-magnetic by removing its magnetic properties. 2 To erase the contents of a magnetic storage device. vb. 1 (label en British spelling) To make something non-magnetic by removing its magnetic properties. 2 To erase the contents of a magnetic storage device.
WordNet
demagnetise
v. erase (a magnetic storage device) [syn: demagnetize]
make nonmagnetic; take away the magnetic properties (of); "demagnetize the iron shavings"; "they degaussed the ship" [syn: demagnetize, degauss] [ant: magnetize, magnetize]