That is what people use for the Alt key. I mean, I use Emacs daily, and I (mostly) like it. But the terminology *) is really fucked up inside Emacs.

Almost no one realizes that perhaps since 35 years no keyboard in mass-use had an "Meta" key. And if the "e" people now still keep that weird name, then they aren't similarly frozen in the state of time as the Emacs community.

1) There's more. Lisp still let bleed assembler instructions that no CPU used in the last 40 years, like CDR and CAR. That's if like e.g. JavaScript would have a cmpxchg() function.

also 1) Or it uses "window" in a very different sense.

and also 1) and even when the term is what you expect, they -- in best english tradition! -- can't normalize on one writing. You can e.g. find both "assoc" and "assq" in use.

So if you want an extremely powerful editor construction kit with an extremely weird nomenclature of parts of it, then chose Emacs.