What is a Slot?

A narrow notch or opening, such as one for receiving coins in a machine or the aperture in a shutter. Also, a designated time or place for an aircraft to take off or land, assigned by an airport or air-traffic control authority.

Visitors can book a time slot a week or more in advance.

A slot is an open position in a schedule or program. He was slotted into the job as chief copy editor.

In slot games, the player inserts cash or, in “ticket-in, ticket-out” machines, a paper ticket with a barcode into the machine’s designated slot. Then the reels spin and, if a combination of symbols is displayed, the player earns credits based on the paytable. The number of possible combinations is limited only by the design of the machine, but classic symbols include fruits, bells, and stylized lucky sevens.

Some slots allow the player to choose the number of paylines they want to wager on for each spin, while others require the player to automatically bet on all available paylines. In general, slots that allow the player to select their own numbers of paylines are referred to as ‘free’ slots while those that always require the player to bet on all available lines are called ‘fixed’ slots.