Someone who is uncompromising and stuck in their ways. Often used in a religious context, zealots are unable to see any other point of view, they are old fashioned and could be described as conservative and perhaps fundamentalist. A Zealot has a real passion or zeal for their beliefs.The word comes from a movement of Jewish uprising against the Romans. Zealots would also often turn upon other Jews for not supporting their militant views and would consider other Jewish sects as weaker and less devout. The word is now used across religions and has a negative implication.