[ dem-uhn-strey-shuhn ]
See synonyms for: demonstrationdemonstrations on

  1. the act or circumstance of proving or being proved conclusively, as by reasoning or a show of evidence: a belief incapable of demonstration.

  2. something serving as proof or supporting evidence: They sent a check as a demonstration of their concern.

  1. a description or explanation, as of a process, illustrated by examples, specimens, or the like: a demonstration of methods of refining ore.

  2. the act of exhibiting the operation or use of a device, machine, process, product, or the like, as to a prospective buyer.

  3. an exhibition, as of feeling; display; manifestation: His demonstration of affection was embarrassing.

  4. a public exhibition of the attitude of a group of persons toward a controversial issue, or other matter, made by picketing, parading, etc.

  5. a show of military force or of offensive operations made to deceive an enemy.

  6. Mathematics. a logical presentation of the way in which given assumptions imply a certain result; proof.

Origin of demonstration

1325–75; Middle English demonstracioun<Latin dēmonstrātiōn- (stem of dēmonstrātiō, equivalent to dēmonstrāt(us) (see demonstrate) + -iōn--ion

Other words from demonstration

  • dem·on·stra·tion·al, adjective
  • dem·on·stra·tion·ist, noun
  • coun·ter·dem·on·stra·tion, noun
  • pre·dem·on·stra·tion, noun
  • re·dem·on·stra·tion, noun
  • sub·dem·on·stra·tion, noun
  • su·per·dem·on·stra·tion, noun
  • un·dem·on·stra·tion·al, adjective

Words Nearby demonstration Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use demonstration in a sentence

British Dictionary definitions for demonstration


/ (ˌdɛmənˈstreɪʃən) /

  1. the act of demonstrating

  2. proof or evidence leading to proof

  1. an explanation, display, illustration, or experiment showing how something works

  2. a manifestation of grievances, support, or protest by public rallies, parades, etc

  3. a manifestation of emotion

  4. a show of military force or preparedness

  5. maths a logical presentation of the assumptions and equations used in solving a problem or proving a theorem

Derived forms of demonstration

  • demonstrational, adjective
  • demonstrationist, noun

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