demo

From WikiWord, the free dictionary

/ˈdɛm.əʊ/ English

Definitions

A demonstration or visual explanation.“The professor prepared a demo to help her class understand the topic.”
A recording of a song meant to demonstrate its overall sound for the purpose of getting it published or recorded more fully.“After hearing the demo the record label approved funding to record the song with a full band.”
An example of a product used for demonstration and then sold at a discount.
A march or gathering to make a political protest.

To record a demo version of a song, usually not intended for commercial release.“The band demoed thirty songs. Their manager thought that ten of the songs would make a good record.”
To demonstrate.