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English definition of “demonstrator”

demonstrator

noun [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: There was a special stand in the shop where a demonstrator was showing 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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