Definition of "curbstone" [curb•stone]

• A stone or row of stones that constitutes a curb. (noun)
• Untrained or unsophisticated; amateurish: a curbstone commentator. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "For the curbstone was a rocking precipice, and the street below it a grey and shimmering stream, that rolled, and flowed, and rolled, and never rested."
• "The man on the curbstone is the arbiter of our destinies, and the standard man."
• "The roadside features such as curbstone edges, potholes, streetcar tracks etc. frequently rattle the nerves of any bicyclist."