eighty-ninth /ˌeɪti ˈnaɪnθ/adjective 1noun 1forms 1 adjective1 •The ordinal form of the number eighty-nine, describing a person or thing in position number 89 of a sequence.The answer appears on the eighty-ninth page of the book.She finished eighty-ninth in the race. noun1 •One of eighty-nine equal parts of a whole.An eighty-ninth of 1780 is 20. formseighty-ninths
