I. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
1. : being number 25 in a countable series
the twenty-fifth day
— see number table
2. : being one of 25 equal parts into which something is divisible
a twenty-fifth share of the money
II. noun
1. : number 25 in a countable series
the twenty-fifth day of the month
2. : the quotient of a unit divided by 25 : one of 25 equal parts of something
one twenty-fifth of the total