A narrow notch, groove or opening, such as a keyway in machinery or a slit for a coin in a vending machine. (Other meanings:) A position in a group, series or sequence; a place in an organization or hierarchy. (See also slit, slot, and shift.) To fit into a slot easily or naturally. He slotted the coin into the machine. The coin slipped easily into the slot.

A slit or opening in the wing of an airplane that is used for airflow control. The term is also applied to the corresponding opening in the tail surface, or to any other device for controlling the flow of air over the aircraft. Air traffic controllers use slots to coordinate takeoff and landing operations at busy airports, and they are also used to prevent repeated delays from the same planes flying into the same runway at the same time.

Using time slots to establish important deadlines and support consistency in workflow. For example, health care providers may organize appointments by appointment type, such as urgent versus routine or new patient consultations, to make it easier for staff members to stay on track with projects.

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