thirty-fifth UK /ˌθɜːti ˈfɪ(f)θ/US /ˌθɚti ˈfɪ(f)θ/adjective 1noun 1forms 1 adjective1 •The ordinal form of the number thirty-five, describing a person or thing in position number 35 of a sequence.The answer appears on the thirty-fifth page of the book.She finished thirty-fifth in the race. noun1 •One of thirty-five equal parts of a whole.A thirty-fifth of 700 is 20. formsthirty-fifths