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

Lipscomb Academy staff asked The Tennessean to vacate the school’s private property during interviews with demonstrators. —Liam Adams, Nashville Tennessean, 26 Sep. 2025

The demonstrators were also seen trying to block vehicles from leaving. —Greg Norman, FOXNews.com, 26 Sep. 2025

Immigration facilities nationwide have been the site of protests, which at times have turned violent with clashes breaking out between federal officers and demonstrators. —Jeanine Santucci, USA Today, 25 Sep. 2025

Five years ago, as demonstrators streamed into public squares to protest the murder of George Floyd by a Minneapolis police officer, many institutions — from public school districts to the State Board of Education — promoted and committed to equity in schools. —Lily Altavena, Freep.com, 25 Sep. 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)