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

But the initial success of the X1 demonstrator does not mean Heart Aerospace is planning to commercialize an all-electric aircraft. — Jeremy Hsu, ArsTechnica, 14 Aug. 2026

On August 12, 2026, Heart Aerospace's 25,000-lb (11,340-kg) X1 demonstrator aircraft took to the skies over Plattsburgh, New York for a 27-minute FAA flight test. — David Szondy august 13, New Atlas, 14 Aug. 2026

Iranian pro-government demonstrators wave flags in Tehran on Tuesday. — Alexander Smith, NBC news, 14 Aug. 2026

The company plans to use the new capital to expand manufacturing, support its go-to-market efforts, build a large-scale demonstrator and advance research and development. — Alexandra Harrell, Footwear News, 13 Aug. 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)