- a person who demonstrates equipment, machines, products, etc
- a person who takes part in a public demonstration
- a piece of merchandise, such as a car that one test-drives, used to display merits or performance to prospective buyers
WordReference Random House Learner's Dictionary of American English © 2026
dem•on•stra•tor /ˈdɛmənˌstreɪtɚ/USA pronunciation
n.
WordReference Random House Unabridged Dictionary of American English © 2026- [countable]
- a person or thing that demonstrates.
- a person who takes part in a public demonstration, as by marching or picketing.
dem•on•stra•tor
(dem′ən strā′tər),USA pronunciation n.
- a person or thing that demonstrates.
- Also, demonstrant. a person who takes part in a public demonstration, as by marching or picketing.
- a person who explains orteaches by practical demonstrations.
- a person who exhibits the use and application of (a product, service, etc.) to a prospective customer.
- the product, device, machine, etc., actually used in demonstrations to purchasers or prospective customers:They sold the demonstrator at half price.
- Latin dēmonstrātor, equivalent. to dēmonstrā(re) (see demonstrate) + -tor -tor
- 1605–15
Collins Concise English Dictionary © HarperCollins Publishers::
demonstrator /ˈdɛmənˌstreɪtə/ n