What is a player lockout?

Related questions

1. Why do games get blacked out?
2. Is Michael Jordan an NBA owner?
3. Are NBA TV games blacked out?
4. Who won the NBA championship in 2009 and 2010?
5. How long was the NBA lockout?
6. Why did NBA have a lockout?
7. What happens during a lockout?
8. Why was the 2012 NBA season shortened?
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Tags

1. #march
2. #lasted
3. #formation
4. #collective
5. #agreement
6. #start
7. #bargaining
8. #lockout
9. #coincided
10. #national
11. #season
12. #prior
13. #regular
14. #owners
15. #stoppage
16. #league
17. #imposed
18. #player
19. #teams
20. #football