regardless of how Webster defines it, Muslims consider anyone that is not one of them an INFIDEL.

·fi·del
[ˈinfədl, ˈinfəˌdel]
NOUN
archaic
a person who does not believe in religion or who adheres to a religion other than one's own:
"they wanted to secure the Holy Places from the infidel"
synonyms: unbeliever · disbeliever · nonbeliever · agnostic · atheist · [more]
ADJECTIVE
adhering to a religion other than one's own:
"the infidel foe"