jackfruitEnglishOxford Dictionary of Englishjackfruit /ˈdʒakfruːt / ▸ noun a fast-growing tropical Asian tree related to the breadfruit. Artocarpus heterophyllus, family Moraceae. ▪ the very large edible fruit of the jackfruit tree, resembling a breadfruit and important as food in the tropics. – ORIGIN late 17th century: from Portuguese jaca (from Malayalam chakka) + fruit.