📒 a public meeting or a march (= an organized walk by many people) at which people show that they are protesting against or supporting somebody/something
📒 a demonstration (= an act of showing or explaining how something works or is done)
📒 a version of an app or computer program that you can try out before you buy the full program
📒 a recording of an example of somebody's music
📒 a demographic (= a section of the population who are of a similar age, the same sex, etc.)