A narrow notch, groove, or opening, especially one for receiving or admitting something, as a coin or letter. Also, a position or assignment in a group, series, or sequence. (Dictionary of the English Language, Fifth Edition)
A slot is a dynamic placeholder that waits for content or receives it from a renderer. It acts in tandem with a scenario to deliver the desired result on a page.
The slots on a slot machine are used to display symbols that correspond to the numbers on the pay table. When all of the winning combinations appear on a pay line, the player wins a certain amount of credits. The number of slots varies from machine to machine, and some have additional features that increase their chances of winning.
Before you decide to play a slot, read reviews or presentations of the game to understand how it works. Many of these games have a theme and may feature characters from a popular movie or TV show. Many have a demo version where you can try them out for free.
Forces of morality and the clergy soon opposed the operation of slot machines, and in 1909 San Francisco banned them. Charles Fey and his competitors responded by creating machines without visible reels, in which purchase and payout (perhaps in drinks and cigars) occurred surreptitiously over the counter of a saloon bar. The machines became known as “one-armed bandits” or “army bandits.” Later, the machines were designed to have more than three reels and a variety of symbols.