I know that * is the wildcard in many expressions, such as some query languages and (as you say) file name globs. However, I don't actually think a wildcard glob is a regular expression. Wikipedia, always a risky source :-), makes that point, with a reference to further reading.

The article is about the asterisk character, and the connection to the wild-card seems legit. But the sentence "I find regular expressions can induce swearing, occasionally" (which I agree fully with!) hints towards the idea that the * is used as a wildcard in regular expressions, which I think isn't quite true.

[1] https://en.wikipedia.org/wiki/Glob_(programming)#Compared_to...

A glob isn't a regular expression, and indeed one of the reasons it isn't is that it lacks the Kleene star - which is the thing an asterisk does in the typical regular expression syntax.