demo
n. countable B1 Intermediate US //ˈdɛmoʊ// UK //dˈɛməʊ// de·mo
n. a short version of a product, like a video game or software, that you can try before you buy it. It can also be a recording of a song that is not finished yet.
n. a preliminary version of a product, typically software or music, distributed for promotional or testing purposes. Often used as a shortened form of 'demonstration' in informal contexts.
I played the game demo before buying the full version.
The band recorded a rough demo in their garage to show the record label their new sound.
The software developer released a playable demo to gather user feedback on the interface before the official launch next quarter.
Usage
Commonly used as a prefix in compound nouns like 'demo version' or 'demo disc'.