What makes a city a metropolis?

Related questions

1. How tall is the Superman statue in Metropolis Illinois?
2. Is Gotham the same as Metropolis?
3. Is there a real town called Smallville?
4. Is Metropolis based on Chicago?
5. What year does metropolis take place?
6. Is Gotham New York or Chicago?
7. Is Singapore a metropolis?
8. Is Tokyo a metropolis?
9. Who is Maria in Metropolis?
10. Is Metropolis a real place?

Tags

1. #because
2. #urban
3. #densely
4. #opportunities
5. #ancient
6. #metropolis
7. #region
8. #living
9. #diners
10. #referred
11. #historically
12. #large
13. #populated
14. #founding
15. #greece
16. #liked
17. #state
18. #elsewhere
19. #there
20. #available
21. #called