Does Resident mean Resident Alien?

I recently read that “Resident” actually means “Resident Alien”, but they omit the word Alien. Now I see this form that has the option, “I’m a US citizen or a resident alien.”

Resident Alien wording displays on form

I’ve already written many times about how resident is someone staying temporarily at a place, as performers have a residency in Las Vegas and ambassadors stay in residences while in other countries.

Now resident could actually mean resident alien, and this makes sense because the man or woman is not a local, they are alien.