Definition of "demonstrator"

demonstrator

/ˈdɛmənstɹeɪtə(ɹ)/

noun
plural demonstrators
1. One who demonstrates anything, or proves beyond doubt.
2. The forefinger.
3. One who takes part in a demonstration; a protester.
4. One who demonstrates products in a retail environment; a merchandiser.
5. An item, particularly a vehicle, used in demonstrations to a customer or user.
  Quotations
  Young people have been involved in choosing which resources and educational toys are used to deliver sex and relationship education – including leaflets, videos and condom demonstrators.
  2006, Ellie Lewis, Promoting the Health and Well-being of Young People in Supported Housing, page 56
6. An assistant to a lecturer.
7. One who teaches anatomy from the dissected parts.