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English definition of “demonstrator”

demonstrator

noun [C] (PERSON SHOWING)    /ˈdem.ən.streɪ.tər/ US  /-t̬ɚ/
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 .People who help or serve people professionallyHelpers and accomplices
(Definition of demonstrator noun (PERSON SHOWING) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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