What is "curbings"

Usage examples of "curbings".

The sun was barely above the roofs to the east of the square, and long shadows lay across the white stone avenue and the sidewalk stones and curbings, and darkened the emerald grass.

They lounged on the curbings and the stoops, they crowded to what few windows there were and on the iron fire escapes.

There must have been millions of people out there, packed from the curbings clear back to the storefronts, and there were people hanging out of all the windows, particularly along lower Broadway, where the buildings were older and they could open the windows, and they were filling the air with shreds of paper, every piece of paper they could get their hands on.