Demagnetise

verb

Definitions

Verb
  1. 1
    To make something non-magnetic by removing its magnetic properties. UK
  2. 2
    make nonmagnetic; take away the magnetic properties (of) wordnet
  3. 3
    To erase the contents of a magnetic storage device.
  4. 4
    erase (a magnetic storage device) wordnet

Etymology

From de- + magnetise.

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