1. plural of fiftieth; the ordinal number corresponding to the number fifty in a sequence

Examples

• The company celebrated its fiftieth anniversary last year.
• She finished in the fiftieth position out of two hundred runners.
• This is the fiftieth time I’ve told you to clean your room.
• The fiftieth state to join the Union was Hawaii.
• He was born on the fiftieth day of the year.
• The book is now in its fiftieth printing.