demonstrator Meaning in Cambridge English Dictionary
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Meaning of "demonstrator" - English Dictionary

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demonstratornoun [C]

uk   /ˈdem.ən.streɪ.tər/  us   /-t̬ɚ/

demonstrator noun [C] (PERSON SHOWING)

a person who explains how something works or how to do something: A demonstrator was showing customers how the food processor worked.

demonstrator noun [C] (PROTESTER)

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.
(Definition of demonstrator from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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