This meaning refers to a practical display of a product, service, process, or skill.
The salesperson gave us a demo of the device.
Watch the video demo before installing the machine.
This meaning refers to a restricted version released so users can test a product before purchasing it.
I downloaded the free demo of the game.
The demo allows access to three levels.
In music, a demo is an early or inexpensive recording used to present a song, performer, or arrangement.
The singer sent a demo to several record labels.
They recorded the song as a rough demo.
