As far as I know "parochial" means of or relating to a church/parish. My dictionary (and Google, or that matters, also says so.)

But recently, I've heard it also means "narrow-minded" (or something similar).
Can anyone tell if this is true? I know one should know better than to ask WHY a word means what it means, but I really want to know how/why "parochial" could mean "narrow-minded".

Thanks,