(Science: zoology) One of two species of large south african antelopes of the genus Catoblephas, having a mane and bushy tail, and curved horns in both sexes.
alternative forms: gnoo.
The common gnu or wildebeest (Catoblephas gnu) is plain brown; the brindled gnu or blue wildebeest (c. Gorgon) is larger, with transverse stripes of black on the neck and shoulders.
Origin: hottentot gnu, or nju: cf. F. Gnou.