Meaning

noun spiny tree having dark red edible fruits

noun dark red plumlike fruit of Old World buckthorn trees

noun chewy fruit-flavored jellied candy (sometimes medicated to soothe a sore throat)

originFrom Middle English jujube, from Medieval Latin jujuba or Old French jujube, perhaps via Old Occitan from Classical Latin zīzyphum, zīzyphus, from Ancient Greek ζίζυφον (zízuphon)․ First attested in the 14th century.

Etymology from Wiktionary, CC BY-SA 3.0