grysbokPronunciation: /ˈgrʌɪsbɒk, ˈxreɪs-/Definition of grysbok noun a small mainly nocturnal antelope with small vertical horns and a slightly arched back, found in SW Africa. Genus Raphicerus, family Bovidae: two species Origin: late 18th century: from Afrikaans, from Dutch grijs 'grey' + bok 'buck'grysbok in other Oxford dictionaries Definition of grysbok in the US English dictionary