demonstrator

Từ điển WordNet v3.1 - WordNet Dictionary

noun

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

• Từ đồng nghĩa / Synonyms:
  protester, sales demonstrator