DEMONSTRATOR


Meaning of DEMONSTRATOR in English

/ ˈdemənstreɪtə(r); NAmE / noun

1.

a person who takes part in a public meeting or march in order to protest against sb/sth or to show support for sb/sth

2.

a person whose job is to show or explain how sth works or is done

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WORD ORIGIN

early 17th cent. (in the general sense a person or thing that demonstrates or proves ): from Latin , from demonstrat- pointed out, from the verb demonstrare .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.