As has been discussed before, that's one definition (capital F fundamentalism).
No, it's not. Can you show me any dictionary that defines fundamentalism as "Let's strip off all of the ritual, tradition, cruft, and bloat that's crept into Christianity over the past 2000 years, and get back to what was preached and practiced back in the First Century"? I didn't think so. That's your own interpretation, and is significantly off the mark, as fundamentalism (being a recent re-interpretration of Christianity) adds its own cruft and bloat.