A narrow opening, often in the shape of a slit, for receiving something, such as a coin or a letter. Also: a place or position, such as the job of chief copy editor. Compare slit, slot, and slat.

A slot is a narrow opening or slit in something that allows something to pass through it, such as a door or window. Slots are often used for mail, keys, and other small objects. They can be made of metal, plastic, wood, or other materials and may have one or more sides. A slot can be rectangular, triangular, or square. It can be as long as a piece of paper or as short as a finger. A slot can be used to hold a pin, a screw, or other hardware.

A slot machine is a casino game that uses reels to produce a sequence of symbols that can form a winning combination, awarding the player with credits. The number of winning combinations depends on the type of slot machine and the pay table, which lists the possible payouts based on the symbol combinations. Many slot machines have a jackpot, which is a large prize that increases periodically. Some have special symbols, such as Wilds, which act as substitutes for other symbols and can help the player win additional prizes or unlock bonus levels. Some have a multi-game feature, which allows players to play several different types of games simultaneously. Psychologists have found that people who play slot machines tend to reach a debilitating level of involvement with gambling three times more quickly than those who play other casino games.