(Canada, informal) The U-shaped area of the Canadian province of Ontario which extends along the northwestern, western, and southwestern shoreline of Lake Ontario from metropolitan Toronto to the Niagara River, comprising one of Canada's most populated and economically productive regions.

The skin of a horse, or leather made therefrom.

plural of horseskin

plural of horseshoe map

(mathematics) Any of a class of chaotic maps of the square into itself, used in the study of dynamical systems.

An open-faced sandwich with meat topped with french fries and smothered with cheese sauce.

plural of horseshoer

One who shoes horses.

A bat of the genus Rhinolophus.

(political science) The theory that the far left and the far right, rather than being at opposite ends of a political continuum, in fact closely resemble one another.