GNU Collaborative International Dictionary of English

Found 2 definitions

1.       
   impala (?), 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.
   
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2.       
   pallah (pălˈlȧ), n. (Zool.) A large South African antelope (Aepyceros melampus).  The male has long lyrate and annulated horns.  The general color is bay, with a black crescent on the croup.  Called also roodebok.
   
   [1913 Webster]