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

Undeterred, the demonstrators maintained their stance, escalating their showdown with Modi’s government, and for the first time, some called for the removal of Modi himself. — Rhea Mogul, CNN Money, 28 July 2026

The demonstrator is currently undergoing final preparations for its first flight in New York. — Rachel Cormack, Robb Report, 27 July 2026

The demonstrator will evaluate power distribution, energy conversion, thermal management and system reliability under realistic operating conditions, helping accelerate the maturity of hybrid-electric aviation technologies. — Prabhat Ranjan Mishra, Interesting Engineering, 26 July 2026

Several students were injured in the crackdown, intensifying anger among demonstrators. — ABC News, 25 July 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)