forty-fifth

forty-fifth

1. The ordinal form of the number forty-five, describing a person or thing in position number 45 of a sequence.

   The answer appears on the forty-fifth page of the book.

   She finished forty-fifth in the race.

English ordinal numbers may function as either an adjective or as a noun, and almost never appear in the plural.

• 45th, 45^th

forty-fifth (plural forty-fifths)

1. One of forty-five equal parts of a whole.

   A forty-fifth of 900 is 20.