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

Video footage verified by CNN shows the moment an officer draws his baton amid a struggle with one demonstrator as other officers tussle with protesters on the ground. —Kara Fox, CNN Money, 6 Sep. 2025

The controversy came at an especially sensitive time after Floyd’s death led to riots and other forms of civil unrest as demonstrators protested against police brutality and racial injustice. —Jason Anderson, Sacbee.com, 3 Sep. 2025

The survivors’ shout to release files became a roar as they were joined by a bipartisan group of lawmakers and hundreds of demonstrators who gathered around them, waving signs of supporting and echoing the demand for transparency. —Emily Goodin, Miami Herald, 3 Sep. 2025

Sotoodeh and Soroudi were charged with misdemeanor trespassing; they, and other anti-Lochte demonstrators, were escorted from the event. —Kimberly Roots, TVLine, 3 Sep. 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)