“10th” (tenth) means:

• The ordinal form of 10, showing position in a sequence.
  • Example: She finished 10th in the race = she was in position number 10.
• It can also refer to:
  • The 10th day of a month (e.g., June 10th)
  • The 10th item in a list or order

In short, it means number 10 in order or rank.