A slot is a narrow notch, groove or opening, such as a keyway in a machine or a slit for a coin in a vending machine.

It is also a position in an organisation or hierarchy, especially one of higher rank or authority. A slot is often used as part of a title, such as the head or chief slot of a bank. A slot is also the name of a specific kind of machine: a slot machine, or fruit machine, as it was first called in England.

The original slot machines were quite simple, with a few paylines and symbols and a single type of symbol that could hit jackpots. Modern digital slots, however, have evolved into complex games that display multiple payline patterns and a multitude of symbols along with their payouts, prizes and game rules. Keeping up with all of this information can be challenging for players, particularly if they’re unfamiliar with the game.

The term “slot” is also used to describe the time in which a plane takes off, or more specifically, the amount of fuel it burns while waiting for its slot at a runway. It’s a controversial topic, with many people believing that slots should be allocated more efficiently to reduce delays and fuel waste.