A slot is a narrow opening, which is either vertical or horizontal, on a piece of equipment. It is also used to refer to a position or sequence, such as a job opening or assignment. A slot is also found on aircraft wings, where it helps improve airflow. The definition of a slot can vary greatly depending on the context.

The term Slot is also used in tagmemics. A slot fits a morpheme sequence that has a specific grammatical function. For example, a slot is a job opening, assignment, or designation, which can fit any morpheme sequence. For example, a chief copy editor has occupied the slot for 20 years. Another example is an airport slot authorized by the air-traffic authority.

A slot-based schedule is often used to help teams prioritize work. These types of schedules help teams plan their work and ensure that they meet important deadlines. A slot-based schedule also helps teams manage time, by creating a sense of expectation for their team members. It also encourages more open communication between departments and teams.

When slot machines first appeared, they were used in casinos as a means of diversion for casual gamers. As they did not require gambling knowledge, anyone could play. This made slots a popular game of choice, and they began to account for 60 percent of the overall gaming profits in the United States.