placeholder
Noun
Meaning
a symbol in a logical or mathematical expression that can be replaced by the name of any member of specified set
a person authorized to act for another
Source: WordNetSynonyms
Antonyms
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Examples
Adding, I’m aware of the terrific Flexnet approach — “ginormous hairball” is a sort of placeholder phrase for it — but there’s only so much time for a given post.
Because it was used alone, not just as a placeholder, this Hellenistic zero was perhaps the first documented use of a number zero in the Old World.
Also, when referring to an example of some person performing a certain action, Perico de los Palotes can also be used as a placeholder for a real name.
All the placeholder virtual machines at the recovery site are replaced by powered on VMs that will be added to the vCenter Server's inventory.
Also, make sure your translation service understands that they should leave these placeholder values untouched.
But, did you know the makers had a placeholder instead of the theme song before the pilot episode released?