ju·jube \ˈjüˌjüb\noun (-s) Etymology: Middle English, from Medieval Latin jujuba, alteration of Latin zizyphum, from Greek zizyphon 1. a.: an edible drupaceous fruit of a tree of the genus Ziziphus: chinese date b.alsojujube tree: a tree that produces jujubes; broadly: a tree of the genus Ziziphus 2.: a fruit-flavored gumdrop or lozenge