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English definition of “demonstrator”

demonstrator

noun [C] (PROTESTER)    /ˈdem.ən.streɪ.tər/ US  /-t̬ɚ/
a person who marches or stands with a group of people to show that they disagree with or support something or someone: Police arrested several of the demonstrators.Activism and pressure groups
(Definition of demonstrator noun (PROTESTER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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