1. a stone or concrete edging along a street that separates the roadway from the sidewalk

Examples

• She sat on the curbstone waiting for the bus.
• The car’s tire scraped against the curbstone as he parked.
• Workers replaced the damaged curbstone after the accident.
• Children often use the curbstone as a balance beam.
• The curbstone was painted yellow to mark the no-parking zone.
• He stepped off the curbstone into the crosswalk.