demonstration

Noun
  1. A show or display;
    The act of presenting something to sight or view (synset 100522618)
    "the presentation of new data"; "he gave the customer a demonstration"
  2. A show of military force or preparedness (synset 100523026)
    "he confused the enemy with feints and demonstrations"
  3. A public display of group feelings (usually of a political nature) (synset 101180193)
    "there were violent demonstrations against the war"
  4. Proof by a process of argument or a series of proposition proving an asserted conclusion (synset 106660791)
  5. A visual presentation showing how something works (synset 106892230)
    "the lecture was accompanied by dramatic demonstrations"; "the lecturer shot off a pistol as a demonstration of the startle response"

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