ninety-first
noun1
One of ninety-one equal parts of a whole.
- A ninety-first of 1820 is 20.
ninety-first
adj1
The ordinal form of the number ninety-one, describing a person or thing in position number 91 of a sequence.
- The answer appears on the ninety-first page of the book.
- She finished ninety-first in the race.