<p><strong>Noun</strong></p><ul><li>the act or circumstance of proving or being proved conclusively, as by reasoning or a show of evidence: a belief incapable of demonstration.</li><li>something serving as proof or supporting evidence: They sent a check as a demonstration of their concern.</li><li>a description or explanation, as of a process, illustrated by examples, specimens, or the like: a demonstration of methods of refining ore.</li><li>the act of exhibiting the operation or use of a device, machine, process, product, or the like, as to a prospective buyer.</li><li>an exhibition, as of feeling; display; manifestation: His demonstration of affection was embarrassing.</li><li>a public exhibition of the attitude of a group of persons toward a controversial issue, or other matter, made by picketing, parading, etc.</li><li>a show of military force or of offensive operations made to deceive an enemy.</li><li>Mathematics: a logical presentation of the way in which given assumptions imply a certain result; proof.</li></ul>