The meaning of blackjack dealer can be interpreted in a few different ways. The most straightforward interpretation is that this is the person who manages the blackjack table.
They ensure the game runs smoothly and make sure all players are following the rules. They also deal the cards and keep track of the score.
Another interpretation is that this is the person who advises players on their chances of winning. They can help players determine if they are strong or weak opponents, and offer advice on how to improve their strategies.
A final interpretation is that this is the person who brings bad luck to players. If they are unlucky, they may find themselves losing money consistently at blackjack.