kinkajouPronunciation: /ˈkɪŋkəˌdʒuː/Definition of kinkajou noun an arboreal nocturnal fruit-eating mammal with a prehensile tail and a long tongue, found in the tropical forests of Central and South America. Potos flavus, family Procyonidae Origin: late 18th century: from French quincajou, alteration of carcajoukinkajou in other Oxford dictionaries Definition of kinkajou in the US English dictionary