1.NounA war which is primarily caused or justified by differences in religion and beliefs.
"The conflict is beginning to look like a holy war between Sunnis and Shias."
2.NounA long-running and acrimonious debate or flame war over personal preferences in technical matters, such as the choice between little-endian and big-endian representation.
3.NounThe rivalry between the sports teams of Brigham Young University and the University of Utah.