http://rsbnetwork.com/2018/09/watch-live-president-donald-trump-holds-maga-rally-in-springfield-mo-9-21-18/
Definition: a quality that you cannot describe that makes someone very special. e.g. "He's a singer who has the X factor."
Other uses:
(tv) A television music competition franchise.
(wrestling) A villainous professional wrestling stable in the World Wrestling Federation
(book) A science fiction book by Andre Norton
(comics) An American comic book series published by Marvel Comics
(astrophysics) The proportionality constant which converts CO emission line brightness to molecular hydrogen mass
(horses) An abnormally large heart seen in some Thoroughbred horses