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

Hamas responded with a violent crackdown, beating and arresting dozens of demonstrators and drawing rare public criticism. Isabel Debre, The Seattle Times, "Israel bombs targets in Gaza as rocket fire resumes," 27 Mar. 2019 The main event will start in Washington, D.C.'s Freedom Plaza, where demonstrators are expected to rally and eventually march toward the Trump Hotel on Pennsylvania Avenue. Julyssa Lopez, Glamour, "A Timeline of the Women's March Controversy," 18 Jan. 2019 This year, demonstrators protesting the parade faced off with neo-Nazis who want the holiday tradition to remain as is, blackface and all. Nadra Nittle, Vox, "Prada pulled a collection of figurines that drew comparisons to anti-black caricatures," 14 Dec. 2018 Federal police in riot gear arrested at least eight demonstrators Thursday and dismantled a makeshift camp on the grounds of an Immigration and Customs Enforcement facility in Portland. Doug Stanglin, USA TODAY, "Federal police arrest at least 8 protesters at ICE facility in Portland," 28 June 2018 In Los Angeles, police arrested 25 demonstrators at a rally Tuesday ahead of Sessions' address. The Christian Science Monitor, "Federal judge orders for separated families to be reunited within 30 days," 27 June 2018 In Los Angeles, police arrested 25 demonstrators at rally Tuesday ahead of Sessions’ address. Elliot Spagat, Time, "California Judge Orders Immigrant Families to Be Reunited Within 30 Days," 27 June 2018 In recent weeks, Israeli soldiers have killed more than 100 Palestinian demonstrators protesting near the Gaza Strip border. Noga Tarnopolsky,, "Argentina's Messi won't play in Jerusalem: How a soccer game became a diplomatic disaster," 6 June 2018 In 1968, New York City police forcibly removed student demonstrators occupying five buildings at Columbia University. azcentral, "AZ Memo: 3rd day of #RedForEd teacher walkouts; Migrants traveling by caravan arrive at the border; Best new meat and seafood shops in PHX," 30 Apr. 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

Statistics for demonstrator

Last Updated

10 Apr 2019

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 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)

Keep scrolling for more

More from Merriam-Webster on demonstrator

Rhyming Dictionary: Words that rhyme with demonstrator

Spanish Central: Translation of demonstrator

Nglish: Translation of demonstrator for Spanish Speakers

Britannica English: Translation of demonstrator for Arabic Speakers

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).


not to be persuaded, moved, or stopped

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Latin Quiz

  • roman forum
  • Which of the following months comes from a Latin word for “ten”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

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!