a person or persons who cannot see beyond their own set of values and/or will not accept them. Is often related to religious matters, where people cannot accept the other religion's beliefs. It often happens where one is in ignorance.
"YOU NARROW MINDED PIECE OF F--KING S--T, CANT YOU SEE HOW YOU ARE CONTRADICTING YOURSELF?? SEE SOMEONE ELSE'S SIDE FOR HELL'S SAKE!!"
My brother can be narrow minded because he thinks that all gays have HIV, and that it is stupid to be gay, and you always get AIDS when you butt-fuck someone.