thirty-first

The ordinal form of the number thirty-one, describing a person or thing in position number 31 of a sequence.

日本語の意味

31番目の / 第31番目の

The thirty-first runner crossed the finish line just seconds after the leader.

31番目のランナーが先頭から数秒遅れてゴールラインを越えた。

意味（1）

The ordinal form of the number thirty-one, describing a person or thing in position number 31 of a sequence.

The answer appears on the thirty-first page of the book.