[dem-uh n-strey-ter]


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 formscoun·ter·dem·on·stra·tor, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for demonstrator

Contemporary Examples of demonstrator

Historical Examples of demonstrator

  • The demonstrator brightened up and picked up one of the toys.

    Toy Shop

    Henry Maxwell Dempsey

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

    Alarm Clock

    Everett B. Cole

  • A demonstrator of anatomy—and he could soothe a nerve as well as expose a muscle.

    The Jucklins

    Opie Read

  • He went out with a demonstrator and the car made good the dealer's word.

  • Mr. Anderson was subsequently curator, and Mr. Wheeler demonstrator.


    George Bryan

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

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