From my understanding a social construct is something that is that is formed through an agreement between people in a society as opposed to something that is an objective observation of physical reality. Like for example money is a social construct, because we all agree that it has value and treat it as such, even though objectively a hundred dollar bill is just a piece of cloth and otherwise would only have as much value as any other piece of cloth. Democracy is a social construct, marriage, the calandar, gender norms, fashion, and crime are all social constructs. It doesn’t mean they aren’t “real” things, just that they’re only real because we all collectively agree they’re real.

If you don’t agree with that definition, I’m curious what you think a social construct is and what things you would believe to be social constructs?