What is the meaning of demo?

noun

• A visual presentation showing how something works.
  • usage: "the lecture was accompanied by dramatic demonstrations"; "the lecturer shot off a pistol as a demonstration of the startle response"
  • synonyms: demonstration

verb

• Give an exhibition of to an interested audience.
  • usage: "She shows her dogs frequently"; "We will demo the new software in Washington"
  • synonyms: show, exhibit, present, demonstrate