demonstrator
1. a teacher or teacher's assistant who demonstrates the principles that are being taught (Freq. 1) • Derivationally related forms: demonstrate • Hypernyms: teacher, instructor 2. someone who demonstrates an article to a prospective buyer • Syn: sales demonstrator • Hypernyms: salesperson, sales representative, sales rep 3. someone who participates in a public display of group feeling • Syn: protester • Derivationally related forms: protest (for: protester), demonstrate • Hypernyms: reformer, reformist, crusader, social reformer, meliorist • Hyponyms: counterdemonstrator, picket
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