Who counts as neurodivergent?

I’ve been trying to understand what the definition of the word “neurodivergent” is. Most definitions I’ve found online are vague and would logically include many groups that are not typically seen as neurodivergent, whereas many neurodivergent spaces I see online are narrow and potentially restrictive. This confusion has led me to lose faith in the term; I’m not sure I could confidently define it. So, I’ve decided to ask the opinion of other “neurodivergent” people: How do you define it? Am I alone in feeling this way?