noun
permanent marker; felt-tip pen
Refers to a permanent marker pen, often used for writing on surfaces like plastic, metal, or whiteboards. The term comes from the brand name 'Magic Marker'.
See also: マジックインキ
ホワイトボードにマジックペンで書いてはいけません。
Don't write on the whiteboard with a permanent marker.
ダンボールに宛先をマジックペンで書いた。
I wrote the address on the cardboard box with a marker pen.