“5th” (fifth) means:

• The ordinal form of 5, showing position in a sequence.
  • Example: She finished 5th in the race = she came in position number five.
• It can also refer to:
  • The 5th day of a month (e.g., July 5th)
  • The fifth item, rank, or place in an ordered list

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