Demonstrator

/dˈɛmənstɹˌe‍ɪtɐ/

/ˈdɛmənˌstɹeɪtɝ/

Demonstrator

a teacher or teacher's assistant who demonstrates the principles that are being taught

someone who participates in a public display of group feeling

synonyms : protester

someone who demonstrates an article to a prospective buyer

Examples

1. Troops drove out the demonstrators.

2. The demonstrators marched in a body to the main square.

3. Demonstrators blocked traffic on streets around the capital.

4. Demonstrators sang protests against police use of tear gas and rubber bullets.