jack2 Syllabification: (jack)Pronunciation: /jak/Translate jack | into French | into German | into Italian | into Spanish Definition of jack noun historical 1another term for blackjack (sense 4). 2a sleeveless padded tunic worn by foot soldiers. [ late Middle English: from Old French jaque; origin uncertain, perhaps based on Arabic]jack in other Oxford dictionaries Definition of jack in the British & World English dictionary
