jack (2)EnglishOxford New American Dictionaryjack2 /jak, dʒæk / ▸ noun historical 1 another term for blackjack (SENSE 5). 2 a sleeveless padded tunic worn by foot soldiers. [late Middle English : from Old French jaque; origin uncertain, perhaps based on Arabic.]
EnglishOxford New American DictionaryEnglishOxford New American Dictionary
EnglishOxford New American Dictionary