horseshoe Definition

a usually U-shaped band of iron fitted and nailed to the rim of a horse's hoof to protect it

something (such as a valley) shaped like a horseshoe

a game like quoits played with horseshoes or with horseshoe-shaped pieces of metal

an arch having an intrados that widens above the springing before narrowing to a rounded or pointed crown

any of several closely related marine arthropods (order Xiphosura and class Merostomata) with a broad crescentic cephalothorax, six pairs of legs, and a spikelike tail; especially : one (Limulus polyphemus) of coastal waters from Maine to the Yucatán Peninsula —called also king crab

curve of railroad track just west of Altoona in south central Pennsylvania designed to enable rail cars to cross the Allegheny Mountains at a manageable incline; 2375 feet (724 meters) long with a 220 degree change of direction; completed in 1854

waterfalls in the Niagara River (36 miles or 58 kilometers long flowing from Lake Erie north into Lake Ontario) on the border between the U.S. (New York state) and Canada (the province of Ontario)

city in western New York at the falls population 50,193

city in southeastern Ontario, Canada, at the falls population 82,997