geladaPronunciation: /dʒəˈlɑːdə/ (also gelada baboon)Definition of gelada noun (plural same or geladas) a brownish baboon with a long mane and naked red rump, native to Ethiopia. Theropithecus gelada, family Cercopithecidae Origin: mid 19th century: from Amharic č'älladagelada in other Oxford dictionaries Definition of gelada in the US English dictionary