A narrow notch or opening, as a keyway in a lock or a slot for coins in a vending machine. Also, the position in a sequence or series, as of jobs or assignments. (Also figuratively: 1.)

When playing slot machines, players insert cash or, in “ticket-in, ticket-out” machines, a paper ticket with a barcode into a slot on the machine and activate a lever or button (either physical or virtual). The reels then spin and stop to rearrange symbols to form combinations that payout credits based on a paytable. Most slot games have a theme, with symbols and bonus features aligned to that theme.

Some slot games offer multiple paylines, which are lines that run vertically, horizontally, diagonally, or in a V shape. These lines can trigger different rewards, including free spins, jackpots, and other bonuses. Understanding paylines can help slot players maximize their winning potential.

An air traffic management slot gives an airline permission to operate at a specific time, when an airport is congested. It is one of the tools EUROCONTROL uses as part of its flow and capacity management role. A slot is valuable because it reduces delays, saves fuel, and improves safety by avoiding unnecessary air travel. It is also a way to ensure the best possible use of limited runway and airport capacity. However, it is important to remember that slots are not guaranteed to produce results. A slot does not mean a payout is due; rather, the outcome of each slot spin is determined by random chance.