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 recent weeks, demonstrators around the nation have rallied to demand the release of Mahmoud Khalil, a Palestinian graduate student and activist at Columbia University. —Thao Nguyen, USA TODAY, 14 Mar. 2025

Five of the protesters from this Saturday’s action received summonses for disorderly conduct while one demonstrator was arrested for resisting arrest, obstruction and violation of local law. —Nicholas Williams, New York Daily News, 9 Mar. 2025

Has the league prepared her to take the next step with the Chicago Sky? Daily Horoscope for March 09, 2025 Daily Horoscope for March 09, 2025 Anti-Trump, Musk protest at Orland Park Tesla countered by MAGA demonstrators Five years ago, COVID gripped the world in fear. —Olivia Olander, Chicago Tribune, 9 Mar. 2025

Trump Threatens Funding Cuts for Colleges This prompted immediate blowback from free speech advocates who accused the administration of violating the First Amendment by threatening pro-Palestine demonstrators with arrest and deportation. —William Lambers, Newsweek, 8 Mar. 2025

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)