動詞
使磁力消失；在研究防盜系統時，此字詞會用作解釋防盜系統判斷一個通過是否合法(valid)的原理 to demagnetize
張卡唔好同啲鎖匙擺埋一齊啦，會消磁㗎。
张卡唔好同啲锁匙摆埋一齐啦，会消磁㗎。
zoeng1 kaat1 m4 hou2 tung4 di1 so2 si4 baai2 maai4 jat1 cai4 laa1, wui5 siu1 ci4 gaa3. Don't put the magnetic card with keys. The card can be demagnetized.
動詞
指用「消磁器」刪除磁碟或磁帶入面嘅資料，「消磁器」產生單向磁場穿過媒體，但其實並非使媒體磁力消失，只係令全部磁段極性重置，有啲温和消磁模式響刪除資料後，媒體能夠重用 degaussing - to erase data on a magnetic media, by applying a unidirectional magnetic field to it, it actually does't demagnetize the media, it just reset the magnetic pattern stored on blocks, some mild degaussing mode can keep the media reusable after process