marker

US /ˈmɑːr.kɚ/
UK /ˈmɑːr.kɚ/
"marker" picture
1.

a felt-tip pen with a broad tip, used for drawing or writing

:
Please use a permanent marker for the labels.
The teacher wrote on the whiteboard with a blue marker.
2.

an object used to indicate a position or place

:
Place a marker at the starting line.
The buoy serves as a marker for the safe channel.
3.

a person who marks something, especially in sports or games

:
The referee appointed a goal marker for the match.
She was the designated marker for the bowling lane.