A casino employee who operates table games, usually distributing the cards, or places bets and pays out winnings at a craps table. A croupier. Many online casinos offer live dealer games to their customers. The dealers are broadcast online in the real time dealing cards or spinning roulette.
Examples:
A poker dealer distributes cards to players and manages the action at a poker table.
Many online casinos have live dealer games.
Blackjack is a comparing card game between a player and dealer. The players compete against the dealer but not against any other players.
The dealer has Blackjack.
Never ask a dealer for advice.
I feel bad for dealers sometimes, when they have to watch people's tantrums. People throw cards at dealers, and dealers have to take it, they cannot fight back.
I always tip the dealer, even if I lose.