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

After a mostly peaceful rally, demonstrators clashed with police, with officers firing rubber bullets, deploying flash-bangs and using tear gas on crowds after people threw rocks, bricks, bottles and commercial-grade fireworks at law enforcement. —Matthew Rodriguez, CBS News, 27 Mar. 2026

Rallies held before court hearing Groups of demonstrators gathered outside the courthouse to rally both in favor of and against Maduro. —Regina Garcia Cano, Chicago Tribune, 26 Mar. 2026

Picket signs constructed by demonstrators protested ICE and called for reform. —Kendrick Calfee, Kansas City Star, 26 Mar. 2026

Police should give demonstrators clear instructions concerning the dispersal order before they are arrested or charged with any crime, according to ACLU. —Hannah Hudnall, IndyStar, 26 Mar. 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)