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[dem-uh n-strey-ter] /ˈdɛm ənˌstreɪ tər/
a person or thing that demonstrates.
Also, demonstrant. a person who takes part in a public demonstration, as by marching or picketing.
a person who explains orteaches by practical demonstrations.
a person who exhibits the use and application of (a product, service, etc.) to a prospective customer.
the product, device, machine, etc., actually used in demonstrations to purchasers or prospective customers:
They sold the demonstrator at half price.
Origin of demonstrator
1605-15; < Latin dēmonstrātor, equivalent to dēmonstrā(re) (see demonstrate) + -tor -tor
Related forms
counterdemonstrator, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for demonstrator
Contemporary Examples
Historical Examples
  • The demonstrator brightened up and picked up one of the toys.

    Toy Shop Henry Maxwell Dempsey
  • Mr. Anderson was subsequently curator, and Mr. Wheeler demonstrator.

    Chelsea George Bryan
  • When the demonstrator of anatomy came by to test our knowledge and to see our work, he asked: “What have you here?”

    Confessions of a Neurasthenic William Taylor Marrs
  • When all was ready the demonstrator took his knife, and pierced my bosom.

  • A demonstrator had the back off from one of the big Lambert-Howell sprayers.

    Alarm Clock Everett B. Cole
British Dictionary definitions for demonstrator


a person who demonstrates equipment, machines, products, etc
a person who takes part in a public demonstration
a piece of merchandise, such as a car that one test-drives, used to display merits or performance to prospective buyers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for demonstrator

1610s, "one who points out," agent noun in Latin form from demonstrate. From 1680s as "one who uses exhibits as a method of teaching;" 1870 as "one who participates in public demonstrations."

Online Etymology Dictionary, © 2010 Douglas Harper
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