antepenultimate /ˌæntipɪnˈʌltɪmət/noun 2adjective 1forms 1 noun2 •The second before the last in a series; the item preceding the penultimate and ultimate. •The syllable that comes two before the last in a word.The words animal, citizen, comedy, and antepenultimate are stressed on the antepenultimate. adjective1 •Two before the last, i.e., the one immediately before the penultimate, in a series.This book has ten chapters — chapter 8 is the antepenultimate one. formsantepenultimates