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Wildcard

noun, verb

Noun

1
A character that takes the place of any other character or string that is not known or specified.
"1968, Digital Equipment Corporation, VAX/VMS 319(5864), page 751, Section 2.1.2 Using Wildcard Characters A wildcard character is a symbol that you can use with many DCL commands to apply the command to several files at once, rather than specifying each file individually."
2
An uncontrolled or unpredictable element.
"There are several technical wildcards, such as how the larger battery packs--four times larger than those of the Prius--will withstand the rigors of city driving, […]"
3
An element, often deliberately concealed, which is withheld for contingency.
4
Alternative form of wild card. alt-of, alternative
"German wildcard Sabine Lisicki conquered her nerves to defeat France's Marion Bartoli and take her amazing Wimbledon run into the semi-finals."
5
A letter or symbol that substitutes for a generic or poorly identified sound, for example capital C for any or some consonant, or capital V for any or some vowel.

Verb

1
To replace or supplement with a wildcard character to allow matching against a range of possible values.
"The unfortunate consequence is that document elements cannot be wildcarded because a schema needs to provide a closed list of possible document elements."

Etymology 1

From wild + card.

Etymology 2

From wild + card.

Unscramble this word: wildcard