What is CSS opacity?

Related questions

1. What does Opacity in lung mean?
2. Are lung opacities common?
3. What is right upper lobe opacity?
4. What does opaque look like?
5. What is background opacity?
6. What is overflow binary?
7. Why does RGB go to 255?
8. What causes opacification of lung?
9. What is color opacity?
10. What is linear opacity of lungs?

Tags

1. #everything
2. #applies
3. #because
4. #default
5. #transparent
6. #basic
7. #specifies
8. #property
9. #opacity
10. #value
11. #initial
12. #inherited
13. #within
14. #parent
15. #element
16. #opaque