Examples of “marker” in a Sentence

noun A felt-tipped pen used for writing or drawing in bold, solid lines.

• She wrote the heading in thick black marker.
• Use a marker to label each box so nobody mixes them up.
• The teacher squeaked a red marker across the whiteboard.

noun An object used to indicate a position, boundary, or point of reference.

• A wooden marker showed where the trail split.
• Runners passed the halfway marker at the ten-kilometer mark.
• Painted white markers along the road help drivers see the edge in fog.

noun A sign or indicator that something is true or likely.

• High blood pressure can be a marker for heart disease.
• Scientists use certain proteins in blood as a marker of inflammation.
• Regular eye contact is often a marker of confidence in conversation.