What Is a Slot?


A slot is a narrow opening, usually of a door or window, through which something may be passed or inserted. A slot can also refer to an assignment or position, as in “a job in the slot”, or to a place or time, as in “a meeting in the slot”. The term is often abbreviated slit or slot.

In electromechanical slot machines, a’slot’ refers to the hole or slot into which cash or, in ‘ticket-in, ticket-out’ machine types, a paper ticket with a barcode is inserted. The slot is then activated by a lever or button (either physical or virtual, depending on the type of machine) which causes reels to spin and stops at positions determined by a random number generator (RNG). If the symbols line up with those on the pay table, the player wins credits based on the amount shown on the pay table. Symbols vary by machine but classic examples include fruits, bells and stylized lucky sevens.

The number of possible combinations on a slot machine is limited by the fact that there are only 22 total symbols, and they appear only once each on a single physical reel. However, when manufacturers incorporated electronics into their products in the 1980s, they increased the number of possible outcomes by weighting certain symbols differently than others. The result was that, even though each symbol would only appear once on the single reel displayed to the player, it could actually occupy several of the stop locations of the multiple reels. The weighting was done with a mathematical algorithm, rather than by simply counting the number of each symbol on each reel and then adding up all the numbers.

As technology has improved, slot games have become increasingly elaborate and innovative. Most have a theme, and the symbols and bonus features are aligned with it. Some have additional ‘feature rounds’ that allow players to choose from objects or interact with characters in some way, and they may also include a jackpot or progressive jackpot.

In the NFL, a slot receiver is a specialist in the middle of the field who is used to catch passes from the quarterback and provide deep threat for the offense. They are typically shorter and stockier than traditional wide receivers, but they must be tough enough to absorb contact and fast enough to blow by defenders. They are a vital part of the playbook for many teams, and some of the top receivers in the league are known for their abilities in the slot. Tyreek Hill and Cole Beasley are just two of the most notable examples.