A slit or narrow opening, especially in a door, container, or machine, into which something can fit. Also, a place in a schedule or program. He slotted the appointment into his schedule. The seat belt slotted into the buckle easily.
In a video game, a slot is a position on the screen where you can place bets. The slots are typically labeled with their minimum and maximum bet values, and may be accompanied by a pay table or other information. It never ceases to amaze us how many people plunge right into playing a new slot without even checking the pay table!
Sports A player who specializes in running shorter routes on the route tree, such as slants and quick outs. A slot receiver can stretch a defense with speed and lateral quickness and is a great addition to any offense.
In computing, a slot is a unit of operation issue and data path machinery surrounding a set of execution units (also called functional units). The slots in a CPU are allocated by a scheduling algorithm based on the number of operations per second and other factors. The term is also used to refer to the same concept in very long instruction word (VLIW) computers, where the relationship between an operation and its pipeline is explicit. See more at wikipedia.org/wiki/Slot_(computer_architecture)