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

Protests such as these have become common across Israel, including last week, when dozens of demonstrators gathered outside the home of Supreme Court President Isaac Amit in Mevasseret Zion. —Timothy Nerozzi, The Washington Examiner, 23 June 2026

Despite the ban, demonstrators gathered at the site on Saturday. —Efrat Lachter, FOXNews.com, 22 June 2026

The streets were packed but not with demonstrators. —Literary Hub, 22 June 2026

There was also unrest in the capital Bogota, where demonstrators burned tires and hurled bricks at police. —CBS News, 22 June 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)