[duh-mon-struh
nt] 
| demonstrator (def. 2). |
[dem-uhn-strey-ter] | 1. | a person or thing that demonstrates. |
| 2. | Also, demonstrant. a person who takes part in a public demonstration, as by marching or picketing. |
| 3. | a person who explains orteaches by practical demonstrations. |
| 4. | a person who exhibits the use and application of (a product, service, etc.) to a prospective customer. |
| 5. | the product, device, machine, etc., actually used in demonstrations to purchasers or prospective customers: They sold the demonstrator at half price. |