The thing is that the botanical definition of berries doesn’t match perfectly with the everyday definition. That doesn’t make the latter wrong, it just has other applications
I don’t have the comparison but before covid people were doing all kind of stuff on their laptops in university. I remember a guy who watched star trek during a lecture and said “the lecture is being recorded, I can watch it later”. Then he watched that lecture during a lecture that wasn’t recorded.
I could try to but I don’t need to. The fact that you could easily name some fruits that aren’t berries is proof enough that you have a concept of what a berry is and what isn’t. Coming up with a definition would be the next step.
So I agree that “definition” is the wrong word. I should have said “concept”. Besides: what’s wrong with definitions that are just a list of elements?