0 informal for demonstration (= a political march): --
1 an example of a product, especially a computer program or piece of recorded music, given or shown to someone to try to make them buy or support it: --
2 to show something and explain how it works, or to show or produce a demo: --
3 short form of demonstration: --
I saw several interesting demos at the trade show last week.
4 a sample (= part) of a product, especially software, that you allow people to try, to encourage them to buy the complete product: --
5 an occasion when you show someone how to use a product or how a new system or product works: --