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

About 25 demonstrators were seen positioned around the lot with flags, drums and bullhorns. —Jack Dunn, Variety, 26 Feb. 2026

Among the demonstrators’ demands was for people to cancel Paramount+, which has been at the center of a number of cultural debates over the past few months. —Fran Hoepfner, Vulture, 26 Feb. 2026

Many of those demonstrators outside waited for over an hour, hoping to get into the pack City Council chamber. —Doug Williams, CBS News, 25 Feb. 2026

Having faced harsh police brutality during the Freedom Ride, Smith embodied the need for stronger federal protections for civil rights demonstrators. —Literary Hub, 24 Feb. 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)