forty-eighth I. \| ̷ ̷ ̷ ̷| ̷ ̷\adjective 1.: being number 48 in a countable series < the forty-eighth day > — see number table 2.: being one of 48 equal parts into which something is divisible < a forty-eighth share of the total > II. noun 1.: number 48 in a countable series 2.: the quotient of a unit divided by 48 : one of 48 equal parts of something < one forty-eighth of the total >