any 3 or more playing cards that have a collective total of 21 (e.g. 6/8/7, 5/7/9, 3/4/5/6/3, etc.) Not Blackjack, but 21.
A total of twenty one does not necessarily indicate a blackjack. A blackjack must be obtained with the first two cards, but a twenty-one can be obtained with any combination of cards, and any number of cards.
Another name for Blackjack.