Meaning

noun an edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)

noun a horse's bit with an attached chain or strap to check the horse

noun a stock exchange in New York

originFrom Middle French courbe (“curve, curved object”), from Latin curvus (“bent, crooked, curved”). Doublet of curve.

Etymology from Wiktionary, CC BY-SA 3.0