Longman Dictionary of Contemporary English homepage

Date: 1900-2000
Origin: demonstration

demo

1 noun
     
Related topics: Music
dem‧o1 plural demos [countable]
1APM a recording containing an example of someone's music that is sent to a record company so that they can decide whether to produce it or not:
a demo tape
2 British English informal an event at which a large group of people publicly protest about something [= demonstration]:
pro-independence demos
3 an explanation of how something works [= demonstration]
4
a) American English an example of a product that is used to show what it is like or how it works:
demo homes on the new development
b) a computer program that shows what a new piece of software will be able to do when it is ready to be sold:
Click here to download a demo of the new version of our personal finance software.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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