English

Definition of zealous adjective from the Oxford Advanced Learner's Dictionary

 

zealous

 adjective
adjective
BrE BrE//ˈzeləs//
 
; NAmE NAmE//ˈzeləs//
 
(formal) Energetic
 
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showing great energy and enthusiasm for something, especially because you feel strongly about it a zealous reformer See related entries: Energetic Word Origin early 16th cent.: from a medieval Latin derivative of Latin zelus ‘zeal, jealousy’.
See the Oxford Advanced American Dictionary entry: zealous