- 1(in card games) a card that has no value of its own and takes the value of any card that the player chooses
- 2a person or thing whose behavior or effect is difficult to predict The Libertarian party is the wild card in the election.
- 3(sport) an opportunity for a player or a team to play in a competition when they have not qualified in the usual way; a player or team that enters a competition in this way They were given a wild card for the tournament. She was beaten in the semi-finals by wild card Louise Smith.
- 4(computing) a symbol that has no meaning of its own and can represent any letter or number An asterisk is commonly used as a wild card. a wild-card search
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