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

In Paris, tear gas filled the air, and trash cans, school desks and chairs were set alight as riot police with shields and batons clashed with some demonstrators. — Melissa Bell, CNN Money, 6 Oct. 2026

Video taken in cities including Paris, Lyon and Strasbourg showed demonstrators facing off with police, lighting fires and dodging tear gas. — Greg Norman-Diamond, FOXNews.com, 6 Oct. 2026

In the aftermath of the article, demonstrators from both sides of the issue gathered outside of Fever games, while Cunningham sometimes was booed in by opposing crowds. — Los Angeles Times, 6 Oct. 2026

Images showed altercations between police and protesters, with officers using batons to strike demonstrators, who threw barriers. — Joseph Wilson, Fortune, 5 Oct. 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)