What does demagnetising mean?
Demagnetising means removing or reducing magnetisation, usually by exposing a material to a carefully controlled magnetic field or through another physical process. In technical settings, the term describes bringing an object out of its magnetised state and reducing or eliminating its magnetic polarity. The word is especially relevant in electronics, where components, recording heads, and magnetic media may require demagnetising during manufacture, maintenance, or disposal. It can also mean making something less magnetic by heating it sufficiently, as happens when certain materials are taken above their Curie temperature. More figuratively, demagnetising can describe weakening something's appeal or power to fascinate, although this use is much less common than the physical sense. The word is especially associated with British spelling, while American English generally writes “demagnetizing.” Its usefulness lies in expressing a specific technical operation more precisely than the general phrase “removing magnetism” while still allowing a broader metaphorical application.
verbDemagnetising is removing or reducing the magnetisation of an object so that it no longer retains magnetic polarity. Figuratively, it can mean reducing something's power to attract or fascinate.
- Physically reducing or removing an object's magnetisation.
- Figuratively reducing something's appeal, attractiveness, or power to hold attention.
"The technician used a demagnetising tool on the watch movement before servicing it."
"The technician is demagnetising the watch movement before replacing the crystal."
"Heating a magnet above its Curie temperature demagnetises it completely."
Demagnetising a magnetic stripe can turn an access card into a modern-day blank slate.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of demagnetising
Demagnetising belongs to the English word family centred on magnet and is formed with dem-, indicating removal, together with the verbal ending -ise. The related forms magnet, magnetic, and magnetism all derive from the same established lexical root, with demagnetisation and demagnetize reflecting later English developments. French has the close cognate démagnétiser, likewise expressing the removal of magnetism.
Related word forms
How demagnetising is actually used
The -ising spelling is standard in British English, while US English normally uses demagnetizing. The literal sense is chiefly technical, appearing in contexts such as electronics, magnetics, data storage, and servicing; figurative uses are less formal and comparatively uncommon.
Easily confused with demagnetising
Magnetising gives an object magnetic polarity, whereas demagnetising removes or reduces that magnetism.