- A character or symbol, such as *, which can be utilized to represent any character, group of characters, value, or the like. For instance, using quant* in a text search may provide results for multiple words starting with quant-, such as quantum, quantity, quantic, quantitative, and so on. A ? is usually utilized to represent a single wild card character, as opposed to a string of them. Also spelled wild card. Also called wildcard character.