okapi Syllabification: (o·ka·pi)Pronunciation: /ōˈkäpē/Definition of okapi noun (plural same or okapis) a large browsing mammal of the giraffe family that lives in the rain forests of the northern Democratic Republic of Congo (formerly Zaire). It has a dark chestnut coat with stripes on the hindquarters and upper legs. Okapia johnstoni, family Giraffidae Origin: early 20th century: a local wordokapi in other Oxford dictionaries Definition of okapi in the British & World English dictionary