dem·​on·​stra·​tor | \ ˈde-mən-ˌstrā-tər How to pronounce demonstrator (audio) \

Definition of demonstrator

: one that demonstrates:
a : a product (such as an automobile) used to demonstrate performance or merits to prospective buyers
b : a person who engages in a public demonstration

Examples of demonstrator in a Sentence

Thousands of demonstrators marched through the streets.
Recent Examples on the Web One demonstrator, who declined to give his name, wore a tactical vest, with a military-style assault rifle slung over his shoulder. Washington Post, "State capitols tighten security and brace for the unknown as far-right groups plot shows of strength," 16 Jan. 2021 Another demonstrator, 41-year-old Ryan Lyles, was arrested on suspicion of unlawful use of mace and being a felon in possession of body armor, troopers said. oregonlive, "4 arrested, 1 suspect sought in protest at Oregon Capitol," 22 Dec. 2020 An anti-Trump demonstrator who was there, Kathy Beynette, told CBS News Deskins crossed the street to where the Trump protesters were gathered while both groups waited for the president to arrive. CBS News, "Trump backer charged with assault after being seen on video exhaling twice on protesters," 23 Nov. 2020 Toyota, Hyundai and Honda each have had company demonstrator cars near the Air Liquide stations. New York Times, "The Gospel of Hydrogen Power," 28 Dec. 2020 Donavan La Bella, a demonstrator critically wounded by a federal officer during Portland protests in July, has returned to a hospital for treatment of a new infection, his mother said Thursday. oregonlive, "Demonstrator wounded by police munition back in hospital with new infection, mother says," 19 Nov. 2020 At the Portsmouth protest, demonstrators managed to rip off the heads of some of the city's Confederate statues while toppling another statue, which police said fell on and critically injured a demonstrator. NBC News, "Virginia police chief fired as felony charges are dropped in Confederate vandalism case," 16 Nov. 2020 Two federal agents grabbed a peaceful demonstrator and bundled him into an unmarked van; the incident was recorded in a video that quickly went viral. Jonathan Stevenson, The New York Review of Books, "Trump’s Praetorian Guard," 24 Sep. 2020 One demonstrator asked for a selfie with the chief. Jennifer Levitz, WSJ, "A Local Police Chief Struggles to Bridge 2020’s Bitter Divisions," 11 Dec. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'demonstrator.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of demonstrator

1611, in the meaning defined above

History and Etymology for demonstrator

demonstrate + -or entry 1

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Time Traveler for demonstrator

Time Traveler

The first known use of demonstrator was in 1611

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Statistics for demonstrator

Last Updated

13 Feb 2021

Cite this Entry

“Demonstrator.” Dictionary, Merriam-Webster, Accessed 3 Mar. 2021.

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More Definitions for demonstrator



English Language Learners Definition of demonstrator

: a person who is part of an event in which people gather together in order to show that they support or oppose something or someone : a person who participates in a demonstration
: a person who shows other people how something is used or done


dem·​on·​stra·​tor | \ ˈde-mən-ˌstrā-tər How to pronounce demonstrator (audio) \

Kids Definition of demonstrator

1 : a person who makes or takes part in a demonstration
2 : a manufactured article (as an automobile) used for demonstration


dem·​on·​stra·​tor | \ ˈdem-ən-ˌstrāt-ər How to pronounce demonstrator (audio) \

Medical Definition of demonstrator

: a teacher or teacher's assistant who demonstrates principles or theories studied (as by dissection, experiment, or chemical preparation)

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