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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 ?
D'Artagnan therefore took the post, and chose a horse which he soon caused to demonstrate, with good spurs and a light hand, that deer are not the swiftest animals in nature.
I've a good mind to make you demonstrate in your own person.
But for your exceeding minuteness," he said, "in describing the monster, I might never have had it in my power to demonstrate to you what it was.
But this only proved to me that they had something to conceal; which was what I had wished to demonstrate.
Nay, even that school which is most accused of atheism doth most demonstrate religion; that is, the school of Leucippus and Democritus and Epicurus.
She had sprung from her chair, as she saw signs that I proposed to demonstrate some of my wants.
And with one of his flourishing gestures he stuck his stick into the water to demonstrate its shallowness.
How can morality have need of my last breaths, and why should I die listening to the consolations offered by the prince, who, without doubt, would not omit to demonstrate that death is actually a benefactor to me?
We shall not even take the trouble to demonstrate this, for it is an axiom in morals, as in physics.
Then one day he wrote to all the London papers to announce that he had made arrangements for an ascent from the Crystal Palace of a machine that would demonstrate satisfactorily that the outstanding difficulties in the way of flying were finally solved.
Perhaps I might add right here, what I hope to demonstrate later, that, so far as I know, the Tuskegee school at the present time has no warmer and more enthusiastic friends anywhere than it has among the white citizens of Tuskegee and throughout the state of Alabama and the entire South.
As soon as Prince Andrew began to demonstrate the defects of the latter and the merits of his own plan, Prince Dolgorukov ceased to listen to him and gazed absent-mindedly not at the map, but at Prince Andrew's face.