1. to remove the magnetic properties from something

Examples

• The technician will demagnetize the hard drive before disposal.
• You can demagnetize a screwdriver by hitting it with a hammer.
• The strong magnetic field can demagnetize credit cards.
• Scientists demagnetize the metal samples before testing.
• Heat can demagnetize certain types of magnets.
• The device is designed to demagnetize tools automatically.