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

Concerns over conditions and due process Other demonstrators echoed concerns about conditions inside detention centers and access to legal protections. —Zachary Bynum, CBS News, 27 Apr. 2026

The demonstrators also waved Iran and Palestine flags as the rain came down and dinner attendees walked into the hotel. —Rebecca Morin, USA Today, 26 Apr. 2026

Two demonstrators, wearing suits, crashed a red carpet photo shoot in the hotel lobby and called for Hegseth to be arrested for war crimes, underscoring how the foreign conflict is fueling the political rhetoric at home. —Ana Ceballos follow, Los Angeles Times, 26 Apr. 2026

In June 2025, Hayam El Gamal’s husband, Mohamed Sabry Soliman, was accused of throwing Molotov cocktails at demonstrators attending a march in Boulder in support of Israeli hostages. —Saul Pink, San Antonio Express-News, 25 Apr. 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)