I. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
1. : being number 23 in a countable series
the twenty-third day
— see number table
2. : being one of 23 equal parts into which something is divisible
a twenty-third share of the money
II. noun
1. : number 23 in a countable series
the twenty-third of the month
2. : the quotient of a unit divided by 23 : one of 23 equal parts of something
one twenty-third of the total