a playing card that does not have any particular value but that can be used to represent any other card:
specialized computing in computers, a symbol that has no particular meaning of its own so that its space can be filled by any real character that is necessary:
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Computer concepts
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someone who is allowed to take part in a competition, even though they have not achieved this in the usual way, for example by winning games:
Competitors & participants in sports & games
someone or something whose behaviour is sometimes unexpected:
Uncertainty
You can also find related words, phrases, and synonyms in the topics:
(in some card games) a card that can be used instead of any other:
(in sports) an extra opportunity to qualify for a championship competition
someone or something whose behaviour or effect is uncertain:
IT, INTERNET a symbol used in computer programs to represent any number or letter:
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