A slot is a narrow opening or groove, usually of a circular shape. Occasionally it can be rectangular or square in shape, but most often the slot is of a round or oval shape. Slots can be found on doors, windows, furniture, machinery, and more. A slot can be a single opening, or an entire part of a larger structure.

A space for a wheel in an airplane fuselage, or a gap in the surface of an airfoil, to allow the movement of the wings during flight. This can improve performance and stability by increasing the flow of air over the surface.

In video slots, a slot is the amount of credits awarded to a player when symbols lined up on the pay line of the machine. The payouts for each symbol combination are listed in a pay table. These tables can be located above and below the reels on older machines, or within a help menu in video slots.

A slot is a special area of the field where a receiver can run routes and beat the defense by using their speed to fly past the safety and secondary when running go routes. Slot receivers also need to be tough enough to absorb contact and have great hands. They can be used to block for running backs or wideouts on outside run plays, as well. Some examples of great slot receivers include Wayne Chrebet, Wes Welker and Charlie Joiner.