CURB

I. noun Etymology: Middle French courbe curve, curved piece of wood or iron, from courbe curved, from Latin curvus Date: 15th century a bit that exerts severe pressure on a horse's jaws, an enclosing frame, border, or edging, check , restraint , a raised edge or margin to strengthen or confine, an edging (as of concrete) built along a street to form part of a gutter, a market for trading in securities not listed on a stock exchange, II. transitive verb Date: 1530 to furnish with a ~, to check or control with or as if with a ~ , to lead (a dog) to a suitable place (as a gutter) for defecation, see: restrain