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

Their mobilization since then has mirrored a wider wave of youth protests in other countries, particularly in South Asia, where Gen Z demonstrators have challenged political elites. — ABC News, 12 Oct. 2026

Tensions peaked when a demonstrator threw a cup of blood from the spectators’ gallery onto the Senate floor, halting business for several hours before the bill passed. — Los Angeles Times, 11 Oct. 2026

The demonstrators ended up on the steps of the Lincoln Park Zoo’s administrative office, where students took turns at a megaphone. — Kate Perez, Chicago Tribune, 9 Oct. 2026

Hundreds of demonstrators gathered on the National Mall on Thursday evening in response to rape allegations at Cornell University. — Sophia Solano, Washington Post, 9 Oct. 2026

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)