'Wildebeest' definitions:

Definition of 'wildebeest'

noun

Large African antelope having a head with horns like an ox and a long tufted tail [syn: gnu, wildebeest]

From: GCIDE

Wildebeest \Wilde"beest`\, n. [D. wild wild + beeste beast.] (Zool.) The gnu. [1913 Webster]