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

One side was sharply critical of Maduro, and included demonstrators who identified themselves as having escaped Venezuela. —Diego Lasarte, New Yorker, 21 Apr. 2026

Some demonstrators breached the fence but did not reach the facility’s interior, and no dogs were removed during the attempt. —Hanna Wickes, Miami Herald, 20 Apr. 2026

Saturday’s protest was the second attempt in as many months by demonstrators to take beagles from Ridglan Farms in Blue Mounds, about 25 miles southwest of the capital, Madison. —Los Angeles Times, 20 Apr. 2026

Saturday's protest was the second attempt in as many months by demonstrators to take beagles from Ridglan Farms in Blue Mounds, about 25 miles (about 40 kilometers) southwest of the capital, Madison. —CBS News, 20 Apr. 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)