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 March, demonstrators took to the streets to oppose his rule and display their support for Magyar. —Ross Rosenfeld, MSNBC Newsweek, 23 Apr. 2025

Defense Secretary Mark Esper refused his request in 2020 to shoot George Floyd demonstrators. —Mark Green, New York Daily News, 20 Apr. 2025

However, when anti-government demonstrators returned to Hong Kong’s streets en masse in 2019, the Democrats’ popularity resurged as many of its leaders stood on the front lines of the massive – and sometimes violent – protests that rocked the financial hub. —Chris Lau, CNN Money, 19 Apr. 2025

The scene shows demonstrators supporting the protagonist. —Georg Szalai, HollywoodReporter, 15 Apr. 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)