demonstrator
1. [ noun ] (work,education) a teacher or teacher's assistant who demonstrates the principles that are being taught
Related terms: teacher show
2. [ noun ] (work) someone who demonstrates an article to a prospective buyer
Synonyms: sales_demonstrator
Related terms: salesperson
3. [ noun ] (politics) someone who participates in a public display of group feeling
Synonyms: protester
Related terms: reformer picket counterdemonstrator protest
Similar spelling:   demonstrate
  demonstrated
  demonstrative
  demonstration
  demonstratively
  demonstrably
  demonstrable
  demonstrability
  demonization
  demonisation