If that is your definition of "Christian", then Islam and Judaism (which you referred to before) would fit into that definition of "Christian." 
 
When the mass majority of people are referring to a "Christian" religion though, they are not using that definition.  
 
Mormonism fitting into the "Christian" Definition, no matter what that definition may be, isn't going to be the deciding factor at the "Pearly gates."  
 
What really matters is following God's Commandments and emulating Christ. Listening to his prophets and recieving the saving ordinances as proscribed by God's word.