thirty-fourth UK /ˌθɜːti ˈfɔːθ/US /ˌθɚti ˈfɔɹθ/adjective 1noun 1forms 1 adjective1 •The ordinal form of the number thirty-four, describing a person or thing in position number 34 of a sequence.The answer appears on the thirty-fourth page of the book.She finished thirty-fourth in the race. noun1 •One of thirty-four equal parts of a whole.A thirty-fourth of 680 is 20. formsthirty-fourths