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 targeted Egyptian embassies abroad as demonstrators accused the Egyptian government of complicity in the blocking of aid. —Mostafa Salem, CNN Money, 21 Aug. 2025

In February, demonstrators hung an upside-down American flag from the same cliff face to protest staffing cuts. —Jesus Mesa gabe Whisnant, MSNBC Newsweek, 20 Aug. 2025

Outside, nearly 1,000 demonstrators demanded more jobs and contracts for the Democratic National Convention to be held there two years later. —Kori Rumore, Chicago Tribune, 18 Aug. 2025

The demonstrator payload is made of two payloads, one with a narrow field-of-view and another that has a wide field-of-view. —David Szondy august 07, New Atlas, 7 Aug. 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)