impala \im*pa"la\, n. An antelope ({Aepyceros melampus}) of Southeastern Africa, the male of which has ringed lyre-shaped horns, which curve first backward, then sideways, then upwards. ALso called {impalla} and {pallah}. [PJC]
Impalla \Im*pal"la\, n. (Zool.) Same as {Impala}. [1913 Webster]