thirty-ninth I. \| ̷ ̷ ̷ ̷| ̷ ̷\adjective 1.: being number 39 in a countable series < the thirty-ninth day > — see number table 2.: being one of 39 equal parts into which anything is divisible < a thirty-ninth share of the money > II. noun 1.: number 39 in a countable series 2.: the quotient of a unit divided by 39 : one of 39 equal parts of anything < one thirty-ninth of the total >