demonstrator
Americannoun
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a person or thing that demonstrates.
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Also a person who takes part in a public demonstration, as by marching or picketing.
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a person who explains orteaches by practical demonstrations.
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a person who exhibits the use and application of (a product, service, etc.) to a prospective customer.
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the product, device, machine, etc., actually used in demonstrations to purchasers or prospective customers.
They sold the demonstrator at half price.
noun
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a person who demonstrates equipment, machines, products, etc
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a person who takes part in a public demonstration
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a piece of merchandise, such as a car that one test-drives, used to display merits or performance to prospective buyers
Other Word Forms
- counterdemonstrator noun
Etymology
Origin of demonstrator
1605–15; < Latin dēmonstrātor, equivalent to dēmonstrā ( re ) ( demonstrate ) + -tor -tor
Explanation
If you participate in a political protest, you are a demonstrator. Demonstrate means to show, and by dint of your presence, you are showing that you agree with the protest message. Demonstrator can also mean someone who demonstrates how something works. Electrolux vacuums were sold by door-to-door salespeople who were also demonstrators––they put horrible messes down on the rug to demonstrate their vacuum's power.
Vocabulary lists containing demonstrator
Purple Hibiscus
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The space launch and technology provider said it had successfully launched its Alpha Flight 7 mission on Wednesday, delivering a demonstrator payload for defense company Lockheed Martin.
From Barron's • Mar. 12, 2026
A demonstrator opposed to Lang, teacher Mia Kurzer, 23, told AFP she "showed up because we have to show that hate has no place in our city."
From Barron's • Mar. 8, 2026
It is unclear what happened to the officer, as the footage cut off, while other officers gave chase to the demonstrator who fled on foot.
From BBC • Jan. 6, 2026
"How long more do we have to wash ourselves in mud and floodwaters," shouted Nurmi Ali, another demonstrator.
From BBC • Dec. 25, 2025
A young demonstrator with “VOTE” stenciled on his forehead in white paint.
From "Because They Marched" by Russell Freedman
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
