Meaning ofdemonstratorin English

Noun

1. a protester or rally participant
   The demonstrator held a sign that read "Save the Planet".
2. a retail product presenter; sales assistant
   A skilled demonstrator can effectively showcase the features of a new product.
3. one who proves or shows something clearly; convincingly
   The professor was a demonstrator of complex mathematical concepts.
4. a sample item for customer demonstration
   The store provided a demonstrator model of the latest smartphone for customers to try.
5. a lecturer's assistant (in a classroom setting)
   The demonstrator assisted the lecturer in explaining the lab procedures.