A saddle horse of a hardy breed developed in Australia and widely used by British and Australian military forces from the mid-1800s through World War I.
An Australian saddle horse of mixed breed, raised chiefly in New South Wales, exported to India for military use in the 19th cent.
(India) A light saddle horse of mixed breed imported from Australia.
Origin of waler
From (New South) Wale(s) + -er.