What Is a Slot?

A narrow notch or opening, especially one for receiving something, such as a slot in a door, the keyway of a lock, or a slit for coins in a machine.

In computer technology, a slot is an area on a motherboard where an expansion card (e.g., an ISA, PCI, or AGP card) can be installed. A slot can also refer to a particular position or arrangement of components on a motherboard, for example, when discussing the location of a CPU socket.


In American football, a slot receiver is a wide receiver that lines up near the line of scrimmage and primarily receives short to medium passes from quarterbacks. Slot receivers are usually shorter and faster than traditional wide receivers, and as such, they must be able to run quick routes and be agile enough to break tackles.

On a slot machine, a pay line is a combination of specific symbols that line up to form winning combinations. Each machine has its own set of symbols, and the number of paylines will vary depending on the game type. Some machines have Wild symbols that can substitute for other symbols and multiply the prize amounts of a winning line. Paylines run vertically or horizontally on a slot machine, and may include shapes as well as straight lines.

The probability of winning a slot machine depends on its RTP rate, which is calculated by the manufacturer and displayed on the machine’s display screen. However, it is important to note that there is no such thing as a “hot” or “cold” slot machine; the odds of a machine paying out are random and do not change over time.