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Definition of Wildcard
1. Noun. (computing) A character that takes the place of any other character or string that is not known or specified. ¹
2. Noun. (qualifier also written wild card) An uncontrolled or unpredictable element. ¹
3. Noun. (sports) (alternative form of wild card) ¹
¹ Source: wiktionary.com
Definition of Wildcard
1. a symbol used in a database search to represent unspecified characters [n -S]