Definition of zealot noun from the Oxford Advanced Learner's Dictionary

 

zealot

 noun
noun
BrE BrE//ˈzelət//
 
; NAmE NAmE//ˈzelət//
 
(often disapproving) Terrorism
 
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a person who is extremely enthusiastic about something, especially religion or politics synonym fanatic See related entries: Terrorism Word Origin mid 16th cent. (in the sense ‘member of an ancient Jewish sect’): via ecclesiastical Latin from Greek zēlōtēs, from zēloun ‘be jealous’, from zēlos.
See the Oxford Advanced American Dictionary entry: zealot