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1. proof or evidence leading to proof
2. a manifestation of grievances, support, or protest by public rallies, parades, etc.
3. Maths a logical presentation of the assumptions and equations used in solving a problem or proving a theorem



(1) A procession, meeting, or other forms of expression of popular sentiments by the masses.

(2) A visual method of acquainting an audience with a phenomenon or object, such as a classroom demonstration of model animals and chemical reactions.

(3) Threatening acts by a state. Figuratively, deliberately accentuated, provocative behavior.

References in classic literature ?
I am desired to say that they deeply regret that their demonstration should have disturbed you personally, Lady Brandon.
The proposition, and demonstration, were fairly written on a thin wafer, with ink composed of a cephalic tincture.
He gave a demonstration with one end of the wire in a coal mine.
It was the result of circumstances and discussions which had occurred during their passage from Europe, and is a full demonstration that the nature of civil government, abstracted from the political institutions of their native country, had been an object of their serious meditation.
And this demonstration is just the thing for me for that other book I am writing, the
They knew, also, that this demonstration would please the King.
This idea admits not of precise demonstration, because there is no rule by which we can measure the momentum of civil power necessary to the government of any given number of individuals; but when we consider that the island of Britain, nearly commensurate with each of the supposed confederacies, contains about eight millions of people, and when we reflect upon the degree of authority required to direct the passions of so large a society to the public good, we shall see no reason to doubt that the like portion of power would be sufficient to perform the same task in a society far more numerous.
The reasons on which Montesquieu grounds his maxim are a further demonstration of his meaning.
Surely a plain statement of facts followed by ocular demonstration ought to suffice.
Had nothing further than my own safety or pleasure been at stake no argument could have prevailed upon me to turn away the one creature upon Barsoom that had never failed in a demonstration of affection and loyalty; but as I would willingly have offered my life in the service of her in search of whom I was about to challenge the unknown dangers of this, to me, mysterious city, I could not permit even Woola's life to threaten the success of my venture, much less his momentary happiness, for I doubted not he soon would forget me.
The anthropoid was overjoyed; but he gave no outward demonstration of his pleasure.
He was at this moment calculating in his mind the number of hours spent since his departure from London, and, had it been in his nature to make a useless demonstration, would have rubbed his hands for satisfaction.

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