■ noun
1》 a playing card that can have any value, suit, colour, or other property in a game at the discretion of the player holding it.
↘ Computing a character that will match any character or sequence of characters in a search.
2》 a person or thing whose qualities are uncertain.
3》 an opportunity to enter a sports competition without taking part in qualifying matches or being ranked at a particular level.
↘a player or team given such an opportunity.