dem·on·stra·tor | \ˈde-mən-ˌstrā-tər \

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

In 2016 several hundred people kept to downtown's Shemanski Park after the previous year's march ended with police blasting demonstrators with tear gas and rubber bullets on the Burnside Bridge. Shane Dixon Kavanaugh,, "After last year's melee, Portland's anti-capitalists throw May Day picnic," 30 Apr. 2018 Yet the protests, which have also included acts of violence by some demonstrators, have been met the past two weeks with live fire from Israeli forces deployed along the border. Dina Kraft, The Christian Science Monitor, "As civilian toll climbs in Gaza, focus on Hamas dampens compassion in Israel," 12 Apr. 2018 These demonstrators don't appear to be just a vocal minority. Alexander Smith /, NBC News, "Trump in Britain: President faces dozens of protests across U.K.," 13 July 2018 When the employee could not hold any more, demonstrators put the rest in a cardboard box on the floor, leaving them for the governor. Zahria Rogers, The Courier-Journal, "Anti-poverty activists finally allowed to enter the Kentucky Capitol," 10 July 2018 On at least two occasions, demonstrators have assembled outside the Kalorama home of Ivanka Trump and Jared Kushner. Paul Schwartzman And Josh Dawsey,, "'It's burning people out': Trump aides endure public fury toward president's policies around D.C.," 9 July 2018 On Saturday, about 120 Americans and 100 Haitians were forced to hole up in the Oasis hotel after demonstrators tried to set the building alight and rush past security. Amanda Erickson, Anchorage Daily News, "Unrest in Haiti leaves dozens of American church groups stranded and unable to leave," 9 July 2018 But shouting demonstrators burst through the ballroom doors., "A long tradition: Americans behaving badly," 5 July 2018 Prior to that, protesters interrupted Homeland Security Secretary Kirstjen Nielsen's dinner at a Mexican restaurant in Washington and demonstrators targeted Trump adviser Stephen Miller at dinner and at his condo. Todd Spangler, Detroit Free Press, "Mich. Trump backer: Venue didn't like my views, canceled fundraiser," 27 June 2018

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.

See More

First Known Use of demonstrator

1611, in the meaning defined above

History and Etymology for demonstrator

demonstrate + -or entry 1

Keep scrolling for more

Learn More about demonstrator

Share demonstrator

Statistics for demonstrator

Last Updated

9 Oct 2018

Look-up Popularity

Time Traveler for demonstrator

The first known use of demonstrator was in 1611

See more words from the same year

Keep scrolling for more

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 \

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 \

Medical Definition of demonstrator 

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

Keep scrolling for more

Comments on demonstrator

What made you want to look up demonstrator? Please tell us where you read or heard it (including the quote, if possible).


lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Spell It

Can you spell these 10 commonly misspelled words?

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!