A slit or other narrow opening, especially one for receiving something, as coins or letters. Also, a position or assignment in a series or sequence, as a time slot on a calendar. (Dictionary of American Heritage)
Football – In passing plays, the player who lines up in the slot is closest to the line of scrimmage and is often responsible for blocking and running routes. They can be larger or more robust than other receivers, but speed and agility are important qualities for this position. On running plays, slot receivers are often in the middle of the field and may be vulnerable to big hits.
Casinos – Slot machines are games that pay out credits according to their pay table. The pay table is displayed on the screen of the machine and lists how much you can win for landing specific symbols on a pay line. Some slots also have special symbols called scatters or bonus symbols, which pay out regardless of their location on the reels and can trigger additional features.
The most effective way to play slots is to start with a game plan. Set a spending budget ahead of time and stick to it. Remember that the casino has a better chance of winning than you do, so protect your bankroll and don’t risk more money than you can afford to lose. Also, don’t be fooled by myths about how to win at slots; most of them are completely wrong.