A slit or other narrow opening, typically in a door, wall, or other surface. An area in a game of chance, especially one with rotating reels that contain symbols. A slot machine that accepts cash or, in “ticket-in, ticket-out” machines, paper tickets with barcodes, and pays out credits based on the paytable.

The slot> HTML element is used to represent a dynamic placeholder that awaits content (a passive slot) or can be called upon by a renderer to fill with specific content (an active slot). A slot may have a named attribute, which lets you specify the name of a custom data source that the renderer can call on to provide the content for the slot.

An airport slot gives an airline the right to operate at a certain time at a constrained airport, such as when air traffic is heavy or the runway is at capacity. These slots can be traded and are a valuable commodity in the aviation industry.

A slot can also refer to a position in a series, sequence, or other grouping. It can also refer to an assignment or job opening, such as a slot on a committee or board of directors. A slot in a computer can also refer to the gap in the operation issue and data path machinery around a single set of instructions in a microprocessor, which is often referred to as an execute pipeline. A slot can also refer to a position on a face-off circle in ice hockey.