wild card • n. a playing card that can have any value, suit, color, or other property in a game at the discretion of the player holding it. ∎ a person or thing whose influence is unpredictable or whose qualities are uncertain. ∎ Comput. a character that will match any character or sequence of characters in a search. ∎ an opportunity to enter a sports competition without having to take part in qualifying matches or be ranked at a particular level. ∎ a player or team given such an opportunity.