The magnificent crossword puzzle

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Across
  1. 1. To choose
  2. 4. To declare
  3. 6. Used in math
  4. 8. In advance
  5. 9. Symbolizes
  6. 12. To shorten
  7. 14. Activity
  8. 15. A state of feeling sad
  9. 17. Desired outcome
  10. 18. Something chosen
  11. 21. Assume
Down
  1. 1. To take away
  2. 2. To press down
  3. 3. A difference
  4. 5. No longer in use
  5. 7. To play a role
  6. 9. No longer existing
  7. 10. To show feeling
  8. 11. Effect on feeling
  9. 13. Tender attachment
  10. 15. To be seperate
  11. 16. Progression
  12. 19. A binding agreement
  13. 20. Show off