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

Police surrounded the demonstrators outside the Caglayan courthouse before detaining them. — ABC News, 15 Sep. 2026

The crackdown — which included police firing tear gas at demonstrators — comes ahead of December’s general election in which President Adama Barrow will seek a controversial third term. — Paige Bruton, semafor.com, 14 Sep. 2026

The song is about the pro-Palestine demonstrators who occupied a building at Columbia University after the murder of Hind Rajab. — Zack Sharf, Variety, 14 Sep. 2026

In fact, even though demonstrators in Bahrain were among the most adept at using these new platforms, their rebellion was the most short-lived. — David Friend, Vanity Fair, 10 Sep. 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)