Definition of "thirty-third" in English

adjective

1. The ordinal form of the number thirty-three, describing a person or thing in position number 33 of a sequence.

   • The answer appears on the thirty-third page of the book.
   • She finished thirty-third in the race.

noun

1. (fractional number) One of thirty-three equal parts of a whole.

   • A thirty-third of 660 is 20.