Demonstration Dem`on*stra"tion, n. [L. demonstratio: cf. F. d['e]monstration.] 1. The act of demonstrating; an exhibition; proof; especially, proof beyond the possibility of doubt; indubitable evidence, to the senses or reason. [1913 Webster]

Those intervening ideas which serve to show the agreement of any two others are called ``proofs;'' and where agreement or disagreement is by this means plainly and clearly perceived, it is called demonstration. --Locke. [1913 Webster]

2. An expression, as of the feelings, by outward signs; a manifestation; a show. See also sense 7 for a more specific related meaning. [1913 Webster +PJC]

Did your letters pierce the queen to any demonstration of grief? --Shak. [1913 Webster]

Loyal demonstrations toward the prince. --Prescott. [1913 Webster]

3. (Anat.) The exhibition and explanation of a dissection or other anatomical preparation. [1913 Webster]

4. (Mil.) a decisive exhibition of force, or a movement indicating an attack. [1913 Webster]

5. (Logic) The act of proving by the syllogistic process, or the proof itself. [1913 Webster]

6. (Math.) A course of reasoning showing that a certain result is a necessary consequence of assumed premises; -- these premises being definitions, axioms, and previously established propositions. [1913 Webster]

7. a public gathering of people to express some sentiment or feelings by explicit means, such as picketing, parading, carrying signs or shouting, usually in favor of or opposed to some action of government or of a business. [PJC]

8. the act of showing how a certain device, machine or product operates, or how a procedure is performed; -- usually done for the purpose of inducing prospective customers to buy a product; as, a demonstration of the simple operation of a microwave oven. [PJC]

{Direct demonstration}, or {Positive demonstration}, (Logic & Math.), one in which the correct conclusion is the immediate sequence of reasoning from axiomatic or established premises; -- opposed to

{Indirect demonstration}, or {Negative demonstration} (called also {reductio ad absurdum}), in which the correct conclusion is an inference from the demonstration that any other hypothesis must be incorrect. [1913 Webster]

The Collaborative International Dictionary of English. 2000.


Look at other dictionaries:

  • démonstration — [ demɔ̃strasjɔ̃ ] n. f. • déb. XIIIe « action de montrer »; a remplacé demostraison; lat. demonstratio, de demonstrare → démontrer 1 ♦ (v. 1155) Opération mentale qui établit une vérité (preuve, induction). Démonstration par l absurde. ⇒ preuve.… …   Encyclopédie Universelle

  • Demonstration — Démonstration En mathématiques, une démonstration permet d établir une proposition à partir de propositions initiales, ou précédemment démontrées à partir de propositions initiales, en s appuyant sur un ensemble de règles de déduction. La… …   Wikipédia en Français

  • Demonstration — may refer to: Demonstration (people), a political rally or protest Demonstration (proof), a conclusive mathematical proof Demonstration (teaching), a method of teaching by example rather than simple explanation Demonstration (military), an attack …   Wikipedia

  • démonstration — DÉMONSTRATION. s. f. Preuve évidente et convaincante. Démonstration claire, nette, invincible, incontestable. Faire une démonstration. Faire la démonstration d une proposition. Il a trouvé la démonstration de ce problème. Démonstration… …   Dictionnaire de l'Académie Française 1798

  • demonstration — Demonstration. s. f. v. (l S se prononce.) Preuve evidente & convainquante. Demonstration claire, nette, invincible, incontestable. faire une demonstration. faire la demonstration d une proposition. il y a demonstration de cela. il a trouvé la… …   Dictionnaire de l'Académie française

  • demonstration — dem‧on‧stra‧tion [ˌdemənˈstreɪʆn] noun [countable, uncountable] an act of explaining and showing how a product works or how something is done: • He gave a demonstration of how the program works. • a sales demonstration (= one done in order to… …   Financial and business terms

  • demonstration — late 14c., proof that something is true, from O.Fr. demonstration or directly from L. demonstrationem (nom. demonstratio), noun of action from pp. stem of demonstrare to point out, indicate, demonstrate, figuratively, to prove, establish, from de …   Etymology dictionary

  • demonstration — [n1] display of proof affirmation, confirmation, description, evidence, exhibition, explanation, exposition, expression, illustration, induction, manifestation, presentation, proof, show, spectacle, substantiation, test, testimony, trial,… …   New thesaurus

  • demonstration — [dem′ən strā′shən] n. [ME demonstracion < L demonstratio < demonstrare: see DEMONSTRATE] 1. the act, process, or means of making evident or proving 2. an explanation by example, experiment, etc. 3. a practical showing of how something works …   English World dictionary

  • Demonstration — (v. lat.), 1) Beweis; bes. im engeren Sinne, so v.w. Apodiktischer Beweis; 2) Vorzeigung zergliederter u. präparirter Körpertheile, mit Erklärung u. Erläuterung derselben zum anatomischen Unterricht; 3) die einem Rechtsgeschäft hinzugefügte… …   Pierer's Universal-Lexikon

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