A narrow notch or opening, such as a keyway in machinery or a slit for coins in a vending machine.

A slot in a calendar or schedule where an activity can take place. Visitors can book a time slot online a week or more in advance.

In computer programming, a space in memory or on disk that is reserved for a particular type of object. The graphical representation of this space is often a rectangle with a shaded area to indicate that it is occupied. (Computer Science)

In gambling, a reel that contains one or more symbols, used to create combinations that pay out credits according to the pay table displayed on the machine. The pay table provides a description of how the symbols work and their payouts. It also displays any bonus features and how to trigger them. Depending on the game, the pay table may be located above or below the spinning reels, or within the help menu.

The job or position of chief copy editor: He had the slot at the Gazette for 20 years.

A slit or hole in an awning, tent, or other covering, through which rainwater can drip.

In ornithology, the narrow gap between the tips of the primaries in certain birds that allows air to flow over them during flight.

A narrow notch or groove in a piece of wood or metal, used for receiving or passing something, such as a screw, bolt, or wire. The word is derived from the French word for “flute” or “vampire,” probably because of the way it appears to disappear or disappear into its surroundings. The hole is sometimes called a slit, a lattice, or a tongue.

a narrow opening in the body of a firearm, or between its barrel and the action. A slot can be closed by a slide, or can be left open for cleaning or loading.

An allocated, scheduled time for an aircraft to take off or land at an airport’s runway, as authorized by the airport or air-traffic control authority.

In aviation, the term is sometimes used to describe a portion of an airplane’s wings, or winglets, that is moved by the elevators during flight to maintain a constant angle with the ground.

A slot in the wing of an aeroplane that allows air to flow over it at a constant velocity.

In ATG Personalization, a slot is a dynamic placeholder that either waits for content to be placed in it (a passive slot) or calls out for it (an active slot). The content in the slot is dictated by a scenario that references a repository item or uses a targeter to fill the slot with content from the Solutions repository. It is not recommended that you use multiple scenarios to feed the same slot, as this can produce unpredictable results. Learn more about slots in the ATG Personalization Programming Guide.