babirusa Syllabification: (bab·i·ru·sa)Pronunciation: /ˌbäbəˈro͞osə, ˌbab-/Definition of babirusa noun a forest-dwelling wild pig with several upturned hornlike tusks, native to Malaysia. Babyrousa babyrussa, family Suidae Origin: late 17th century: from Malay, from babi 'hog' + rusa 'deer'babirusa in other Oxford dictionaries Definition of babirusa in the British & World English dictionary