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

Authorities said 21 demonstrators, 12 men and 9 women, were arrested after blocking traffic and refusing orders to disperse, according to affiliate FOX 32 Chicago. —Michael Dorgan , Alexandra Koch, FOXNews.com, 14 Nov. 2025

While there, a male demonstrator became upset, accused Stayton of antagonizing him, and said the officer was complaining that his watch broke during the arrests. —Jolene Almendarez, Cincinnati Enquirer, 12 Nov. 2025

The demonstrators, some wielding bats, appeared to be asserting the jurisdiction of the Edo people’s ceremonial king, Oba Ewuare II, over the region’s cultural patrimony. —News Desk, Artforum, 10 Nov. 2025

But Bovino, who has said agents have acted proportionally and in response to attacks from demonstrators, expressed ambivalence about protesters being injured – also a direct violation of CBP’s use of force policy. —Andy Rose 19 Hr Ago, CNN Money, 9 Nov. 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)