ninety-eighth I. \| ̷ ̷ ̷ ̷| ̷ ̷\adjective 1.: being number 98 in a countable series < the ninety-eighth day > — see number table 2.: being one of 98 equal parts into which something is divisible < a ninety-eighth share of the money > II. noun 1.: number 98 in a countable series 2.: the quotient of a unit divided by 98 : one of 98 equal parts of something