What does it mean for a programming language to be "dying" or dead? If the language is being maintained and bugs fixed, is that dying? Can a language be comp

What does it mean for a programming language to be "dying" or dead? If the language is being maintained and bugs fixed, is that dying? Can a language be complete? If it's not gaining new feature, does that mean it's dying? Is it the number of users that matters? What if a language has 10,000, 100k or 1 million happy users is that not enough? If I wrote a custom language for me and a few friends or companies and there's 100 of us using it, no one would declare the language dying. So why do we use number of users? Is it dependent on the number of available jobs? new Books, articles, or library/modules published? I'm not so sure, but I'll like to know what makes a language a dying or dead language.