wild card - definition in the Business English Dictionary - Cambridge Dictionaries Online

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English definition of “wild card”

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wild card

noun [C]
 
 
someone or something whose behaviour or effect is uncertain: US consumer confidence remains the wild card in the unpredictable economic climate.
IT, INTERNET a symbol used in computer programs to represent any number or letter: The wild cards in this string are represented by asterisks.
(Definition of wild card from the Cambridge Business English Dictionary © Cambridge University Press)
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