Wild Symbol

In the context of slot machine gambling, a wild is a symbol that can take the place of most other symbols for the purposes of creating winning combinations on the paylines. Wilds typically cannot take the place of scatters and other special symbols.

Some slot machines include additional advanced wild symbols, such as expanding wilds, sticky wilds, and stacked wilds.

In video poker games, such as Deuces Wild Poker, wild cards serve the same purpose, being able to take the place of any card for the purpose of creating a strong hand. 

Wild symbol:

• A slot symbol that can substitute for other symbols to create winning combinations.