thirty-seventh UK /ˌθɜːti ˈsɛvənθ/US /ˌθɚti ˈsɛvənθ/adjective 1noun 1forms 1 adjective1 •The ordinal form of the number thirty-seven, describing a person or thing in position number 37 of a sequence.The answer appears on the thirty-seventh page of the book.She finished thirty-seventh in the race. noun1 •One of thirty-seven equal parts of a whole.A thirty-seventh of 740 is 20. formsthirty-sevenths