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

Photos from the protest captured the demonstrator being arrested by Capitol Police, while the MAGA supporter was pictured with a streak of blue spray paint across the side of his face. —Josh Hammer, Newsweek, 18 Feb. 2025

An organizational flag flies outside of the Office of Personnel Management in Washington, D.C. on February 7, 2025 as demonstrators gather to protest federal layoffs and demand the termination of Elon Musk from the Department of Government Efficiency (DOGE). —Sara Salinas,laya Neelakandan, CNBC, 18 Feb. 2025

The demonstrators clashed with police on Friday near where Khaleghi was killed outside a university dormitory by two unknown robbers. —Brie Stimson, Fox News, 16 Feb. 2025

Lincoln Heights resident Eric Ruffin said at Tuesday night's village meeting that one of the demonstrators called him a racial epithet. —Antonia Hylton, NBC News, 12 Feb. 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)