What does XO mean at the end of a text message?

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Tags

1. #relationship
2. #receive
3. #moving
4. #other
5. #simply
6. #special
7. #friendly
8. #texting
9. #gesture
10. #modern
11. #someone
12. #slang
13. #seeing
14. #direction
15. #least
16. #kisses
17. #right
18. #daily
19. #shortcode
20. #times