Note:  Do not rely on this information. It is very old.


Curb (fr. French courber, and Lat. curvus), that which is bent, or that which bends, turns, restrains or limits. In driving or riding the curb is a chain passing from the cheek-pieces of a horse's bit beneath his lower jaw, and capable of bringing a powerful leverage to bear upon the jaw. The curb of a well is the stone casing which prevents its falling in, and the curb of a street is the edging that demarcates the street from the pavement. The word is largely used in metaphor.