seventy-fifth /ˌsɛvənti ˈfɪ(f)θ/adjective 1noun 1forms 1 adjective1 •The ordinal form of the number seventy-five, describing a person or thing in position number 75 of a sequence.The answer appears on the seventy-fifth page of the book.She finished seventy-fifth in the race. noun1 •One of seventy-five equal parts of a whole.A seventy-fifth of 1500 is 20. formsseventy-fifths