I. | ̷ ̷ ̷ ̷| ̷ ̷ adjective
1. : being number 54 in a countable series
the fifty-fourth day
— see number table
2. : being one of 54 equal parts into which something is divisible
a fifty-fourth share of the money
II. noun
1. : number 54 in a countable series
2. : the quotient of a unit divided by 54 : one of 54 equal parts of something
one fifty-fourth of the total