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

The demonstrators seemed embarrassed by the fact that they had been brought there by an Ed Sheeran concert. — Naaman Zhou, New Yorker, 22 Sep. 2026

Some demonstrators cursed at police officers holding riot shields, while others yelled out as passing cars honked in support of the protest. — Arkansas Online, 21 Sep. 2026

Before Saturday’s show, a group of about 50 pro-Palestinian demonstrators congregated outside the stadium. — Tassanee Vejpongsa, Los Angeles Times, 20 Sep. 2026

Nepal elected Shah in March following a surge of violent protests in the country led by Gen Z demonstrators following a government ban of social media platforms. — Sasha Rogelberg, Fortune, 20 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)