Blackjack is both the name of the game, and the name of a winning hand. If any player – you or the dealer – receives an Ace and a ten-value card (i.e. a ten or a face card) as your initial two cards, this is called a blackjack. In this instance, the player dealt the blackjack automatically wins this hand.
If your cards add up to more than 21, this is called a ‘bust’, and means you lose that hand and your bet.
If, once you and the dealer are done taking cards, you have a higher hand than the dealer and you didn’t go over 21, you win! Typically, you earn back your original wager, plus that same amount again. For example, if you wager $10 and win, you’ll be paid $20.
If, once you and the dealer are done taking cards, you end up with the same total, this is called a “push”. This is essentially a tie, and your original wager will be returned to you.