a) In computers, an opening or place for insertion of an expansion card that adds some circuitry, such as video acceleration, sound control or disk drive capability. Most desktop computers come with a number of expansion slots.

b) In casinos, the total value of coins or tokens removed from a slot machine’s drop bucket or drop box for counting by the casino’s hard count team through the use of a weigh scale. A weight count is a standard procedure used to detect any manipulation of the game’s machines.

In games, a symbol that substitutes for most other symbols in a slot (similar to a joker card). The way wild symbols behave depend on the specific game and whether the player is in a bonus or free games mode. Wilds may only appear on certain reels, or have a chance to “stack” across the entire reel. Sometimes, players can even win a jackpot with a single wild symbol!