ETYM French zélote, Latin zelotes, Greek zulos. Related to Zeal.
1. One who is zealous; one who engages warmly in any cause, and pursues his object with earnestness and ardor; especially, one who is overzealous, or carried away by his zeal.
2. One absorbed in devotion to anything; an enthusiast; a fanatical partisan.

A member of a fanatical sect arising in Judea during the first century A.D. and militantly opposing the Roman domination of Palestine
Member of a revolutionary Jewish nationalist group in Roman Palestine, which broke away from the Pharisees.