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

As the demonstrators held their signs and offered chants criticizing Trump, Musk and their policies, horn-honking from passing motorists in support of the protestors was nearly constant. —Steve Sadin, Chicago Tribune, 7 Apr. 2025

Many pro-Palestinian demonstrators have worn masks during demonstrations. —Steve Holland and Kanishka Singh, USA Today, 4 Apr. 2025

Student organizers expect a crowd of up to 500 demonstrators rallying on behalf of students of all ages, kindergarten to college. —Anna Spiegel, Axios, 3 Apr. 2025

For all of this, any denial of the genuine nature of the grievances of the demonstrators, and most importantly their belief that if Hamas leaves the governance scene, the war might stop and life might improve, is misplaced and reflects serious miscalculation. —Khalil Shikaki, Time, 2 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)