marker

noun
B2+
1
B2+
an object or a sign that shows the position of something
علامت, نشانه, نشانگر
see also discourse marker
2
B2+
a sign that something exists or that shows what it is like
نشانه, علامت, شاخص
Price is not always an accurate marker of quality.
3
a pen with a thick felt tip
ماژیک, قلم نوک نمدی, ماژیک رنگی
see also Magic Marker™
4
a person who marks students’ work or exam papers
ارزیاب, تصحیح کننده, نمره‌دهنده, مصصح, بازبین
5
a player who stays close to a player on the other team in order to stop them getting the ball
مدافع, بازیکن مهارکننده