A narrow opening or a hole in a vehicle’s roof or door, usually on the edge of the body or frame. The slot is used to secure the hatch closed or to open and close it. Also called slit, notch, aperture, or vent.

A fixed or variable number of paylines in a slot machine. Most modern slots offer multiple paylines, which increase the player’s chances of winning by increasing the odds of hitting a paying combination. In addition, many online slots have progressive jackpots that can increase the prize amount by each bet.

A position or time at which a ship or aircraft can take off or land, as authorized by an airport or air-traffic control authority: We can get our plane into the slot on the next runway. Also: an assigned space or time in which something fits, as in He reserved a slot for his paper at the newspaper. This article also discusses the use of slot in digital content management.