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

Salt Lake City police had said Gamboa brought an assault-style rifle to the rally and was moving toward the crowd with the weapon raised when a safety volunteer for the event fired three shots, wounding Gamboa and killing a nearby demonstrator, Arthur Folasa Ah Loo. —Matthew Brown, Los Angeles Times, 21 June 2025

These are psychopaths, and their behavior should not be tolerated, and their actions should not be used to delegitimize peaceful demonstrators. —Stepheny Price, FOXNews.com, 21 June 2025

Now, Honda has flown a technology demonstrator rocket as a research project with possible eyes on the booming satellite launching business. —David Szondy june 21, New Atlas, 21 June 2025

The raids sparked widespread protests in L.A. as demonstrators called for ICE to leave the city. —Sonam Sheth, MSNBC Newsweek, 20 June 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)