A narrow opening or groove in a machine or container into which something can fit. The car seat belt slots into place easily.

In computer processing, a slot is a type of processor connection designed to make upgrading the CPU easier. It is now rarely used in new computers, with socket processors being the norm.

On a slot machine, the player inserts cash or (on “ticket-in, ticket-out” machines) a paper ticket with a barcode into a designated slot, then activates a lever or button on a physical or virtual console. The reels then spin and stop to rearrange symbols to produce a combination of credits, based on the paytable. Depending on the game, these may be redeemable for prizes or used to accumulate winnings.

Whether playing for real money or just for fun, a good strategy is important for success at the slot machine. Knowing the odds of hitting a certain symbol on a given payline will help you decide how much to bet and how long to play. Avoid getting greedy and betting more than you can afford to lose. This is the biggest mistake that many slot players make, and it often leads to them losing their money.

In the field of air traffic management, a slot is a time period during which an aircraft can take off or land at a given airport. Using slots can reduce congestion, save energy and fuel and avoid the repeated delays that can result from overbooking or unscheduled flight arrivals and departures.