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

McKinney would prioritize public safety and vows to go after demonstrators who block freeways or engage in conduct similar to the 2024 pro-Palestine encampments on UCLA’s campus. — Times Staff, Los Angeles Times, 3 Nov. 2026

Police detained three people after some demonstrators clashed with officers outside the court complex. — Tyler Speicher, FOXNews.com, 2 Nov. 2026

When officers confront violent groups alongside students, younger demonstrators may later come to identify with those being targeted. — Saskya Vandoorne, CNN Money, 30 Oct. 2026

Federal prosecutors accused Soliman of attacking in June 2025 because the demonstrators were Jewish. — ABC News, 29 Oct. 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)