ninety-eighth /ˌnaɪnti ˈeɪ(t)θ/adjective 1noun 1forms 1 adjective1 •The ordinal form of the number ninety-eight, describing a person or thing in position number 98 of a sequence.The answer appears on the ninety-eighth page of the book.She finished ninety-eighth in the race. noun1 •One of ninety-eight equal parts of a whole.A ninety-eighth of 1960 is 20. formsninety-eighths