What is Aria expanded?

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Tags

1. #denotes
2. #false
3. #currently
4. #items
5. #invisible
6. #collapsed
7. #takes
8. #values
9. #means
10. #expandable
11. #expanded
12. #visible
13. #section
14. #purpose
15. #element
16. #global
17. #exactly
18. #attribute