A slot is a narrow, elongated depression or groove or notch that receives or admits something, especially coins or cards. In casino games, slots are the areas into which money is inserted or bets are placed to trigger various features and win rewards. The term has since expanded to include all types of gambling machines.

A player inserts a coin or paper ticket into the slot on the machine and presses a spin button to initiate a round. When the reels stop, the symbols lining up in the payline indicate whether or not the player has won. Modern video slots may use different symbols to represent different payouts and have additional paylines and Wilds that substitute for other symbols on the reels.

Online slots are digital versions of traditional casino games with a variety of themes and features. Some offer progressive jackpots, others have bonus rounds that increase the chances of winning big. Players can also choose from a range of denominations and wagering limits.

In computer science, a slot is a dynamic placeholder that either waits for content to be added (a passive slot) or calls out for it to be filled in (an active slot). It is usually implemented using a scenario and/or a renderer.

In football, the slot receiver is typically the third-string wide receiver and specializes in catching passes over the middle of the field. Exceptional slot receivers can also run long routes and be involved in trick plays like end-arounds.