demonstrator

noun

dem·​on·​stra·​tor ˈde-mən-ˌstrā-tər 

: 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

Motorists drive vehicles near a large political banner, depicting missiles being fired behind Iranian demonstrators in solidarity with the government, at Valiasr Square in Tehran on April 6, 2026. —Leonie Kidd, CNBC, 26 May 2026

The federal agents removed demonstrators who were blocking the entrance, even deploying pepper spray. —Nick Caloway, CBS News, 26 May 2026

Police parked anti-riot vehicles in a central Belgrade area to block the demonstrators from returning, and the violence soon ended. —Jovana Gec, Los Angeles Times, 24 May 2026

No one argues that the Honduran with a criminal record shouldn’t have been picked up and sent to the infamous ICE holding facility in Broadview, the western suburb in Cook County, which last fall was the target of numerous protests by anti-immigration demonstrators. —Charles Selle, Chicago Tribune, 22 May 2026

Word History

Etymology

demonstrate + -or entry 1

First Known Use

1593, in the meaning defined above

Phrases Containing demonstrator

• counter-demonstrator

Rhymes for demonstrator

• activator
• actuator
• agitator
• alligator
• allocator
• alternator
• animator
• annotator
• applicator
• arbitrator
• aspirator
• aviator

Kids Definition

demonstrator

noun

dem·​on·​stra·​tor ˈdem-ən-ˌstrāt-ər 

1

: a person who makes or takes part in a demonstration

2

: a manufactured article (as an automobile) used for purposes of demonstration

Medical Definition

demonstrator

noun

dem·​on·​stra·​tor ˈdem-ən-ˌstrāt-ər 

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