wanderooPronunciation: /ˌwɒndəˈruː/Definition of wanderoo noun (in Sri Lanka) a leaf monkey or langur. Genus Presbytis, family Cercopithecidae: the purple-faced leaf monkey (P. vetulus), or the hanuman (P. entellus) Origin: late 17th century: from Sinhalese wanderu 'monkey'wanderoo in other Oxford dictionaries Definition of wanderoo in the US English dictionary