Wielki słownik angielsko-polski red. nacz D. Jemielniak, M. Miłkowski
                        (Noun) sport dwadzieścia jeden, oczko;
Wordnet angielsko-polski 
                        (a gambling game using cards
the object is to hold cards having a higher count than those dealt to the banker up to but not exceeding 21) 
blackjack 
synonim: blackjack
synonim: twenty-one