What does beam width mean?

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Tags

1. #radiated
2. #diameter
3. #antenna
4. #pattern
5. #points
6. #always
7. #angle
8. #plane
9. #referenced
10. #horizontal
11. #between
12. #radio
13. #beamwidth
14. #effective
15. #width
16. #expressed
17. #usually
18. #degrees
19. #power